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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 8007972 | Electrophotographic photoconductor, and image forming apparatus, process cartridge and image forming method using the same An object of the present invention is to provide an image forming apparatus containing an electrophotographic photoconductor, a charging unit, an exposing unit, a developing unit, a transfer unit and a cleaning unit, wherein the el... | 08/30/2011 |
| 7919220 | Electrophotographic photoreceptor, image forming apparatus and process cartridge An electrophotographic photoreceptor, comprising: an electroconductive substrate; and a photosensitive layer located overlying the electroconductive substrate, wherein the photosensitive layer is a... | 04/05/2011 |
| 7838191 | Electrophotographic photoconductor having titanyl phthalocyanine and image forming apparatus The present invention provides a monolayer type electrophotographic photoconductor which can effectively suppress the generation of an exposure memory and exhibits high sensitivity and an image forming apparatus using the monolayer type electrophotographic photocond... | 11/23/2010 |
| 7494754 | Electrophotographic photoreceptor containing asymmetric naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the same An electrophotographic photoreceptor and an electrophotographic imaging apparatus include an asymmetric naphthalenetetracarboxylic acid diimide derivative. The asymmetric naphthalenetetracarboxylic acid diimide derivative has increased solubility in organic solvents... | 02/24/2009 |
| 7432029 | Electrophotographic photoreceptor containing asymmetrical naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the photoreceptor An electrophotographic photoreceptor is provided containing a specific asymmetric naphthalenetetracarboxylic acid diimide derivative having a nitro group. An electrophotographic imaging apparatus, an electrophotographic cartridge, and an electrophotographic drum emp... | 10/07/2008 |
| 7427460 | Hydrazone-based charge transport materials having an ethylenically unsaturated group Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the ... | 09/23/2008 |
| 7396624 | Electrophotographic photoreceptor containing naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the same An electrophotographic photoreceptor containing a naphthalenetetracarboxylic acid diimide derivative of Formula (1), which has a branched alkyl group substituted with an aryl group at the α-position with regard to nitrogen atoms of imide groups: ... | 07/08/2008 |
| 7381512 | Hydroxygallium phthalocyanine pigment and process for the production thereof, electrophotographic photoreceptor, process cartridge, electrophotographic device and image formation method A hydroxygallium phthalocyanine pigment is characterized by having a maximum peak wavelength within a range of from 810 nm to 839 nm in optical absorption spectrum in a wavelength range of from 600 nm to 900 nm. ... | 06/03/2008 |
| 7371497 | Electrophotographic image forming method An electrophotographic image forming apparatus comprising: an electrophotographic photoreceptor comprising: an electroconductive substrate; a charge generation layer; and ... | 05/13/2008 |
| 7364770 | Coated fine particles and method for producing coated fine particles by reverse Diels-Alder reaction An object of the present invention is to provide coated fine particles with a uniform particle size, having stable crystals on the surface, and to provide colored fine particles which exhibit good color development. A recorded image formed by a dispersion and an ink... | 04/29/2008 |
| 7334458 | Direct method to determine particulate concentration in a dispersion Particulate material concentration of a dispersion is detected by providing a known amount of dispersion including particulate material, a solvent, and other optional components; centrifuging the dispersion and separating the particulate material from the dispersion... | 02/26/2008 |
| 7333752 | Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus which have the electrophotographic photosensitive member An electrophotographic apparatus is disclosed using an electrophotographic photosensitive member which employs light with a short wavelength (380 nm to 500 nm) as image exposure light and is good in photoelectric conversion efficiency on the whole at that wavelength... | 02/19/2008 |
| 7320849 | Organophotoreceptor with a charge transport material having two epoxidated-hydrazone groups Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the ... | 01/22/2008 |
| 7318986 | Photoconductive members A photoconductive imaging member containing a photogenerating layer, and a charge transport layer containing a binder and a suitable polyimide, and more specifically, an amorphous polyimide. ... | 01/15/2008 |
| 7314692 | Phenylazomethylene-cyclohexadienone derivatives comprising electron withdrawing group and electrophotographic photoreceptor comprising the derivatives A phenylazomethylene-cyclohexadienone derivative and an electrophotographic photoreceptor include a compound that is represented by the following formula: wherein R1 and R2 are independently... | 01/01/2008 |
| 7309552 | Electrophotographic photoconductor, electrophotography, electrophotographic apparatus, process cartridge for electrophotographic apparatus and azo compound To provide a highly sensitive and highly durable electrophotographic photoconductor, electrophotography, photographic apparatus and process cartridge for the electrophotographic apparatus which is practical for a high-speed copying machine as well as for a laser pri... | 12/18/2007 |
| 7300732 | Organophotoreceptors with azine-based compounds Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula, | 11/27/2007 |
| 7297458 | Imaging members A photoconductive member containing a supporting substrate, a photogenerating layer, and a charge transport layer and wherein the photogenerating layer comprises a photogenerating component, and an electron transport component. ... | 11/20/2007 |
| 7291429 | Naphthalenetetracarboxylic acid diimide derivatives and electrophotographic photoconductive material using the derivatives Naphthalenetetracarboxylic acid diimide derivatives and an electrophotographic photoconductive material containing the naphthalenetetracarboxylic acid diimide derivatives. The naphthalenetetracarboxylic acid diimide derivatives have a structure represented by the fo... | 11/06/2007 |
| 7291432 | Imaging members A photoconductive imaging member with linear and proportional collection efficiencies and substantially constant photoinduced characteristics comprised of a supporting substrate, and thereover in, for example, certain weight ratios, a single layer comprised of a mix... | 11/06/2007 |
| 7270926 | Imaging member A process for preparing a charge generating layer comprising dispersing photoconductive phthalocyanine particles in a polymer matrix, the matrix comprising a polymeric film-forming reaction product of vinyl chloride, vinyl acetate, maleic acid, and hydroxyalkyl acry... | 09/18/2007 |
| 7261987 | Azine-based charge transport materials having a bicyclic heterocyclic ring Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the ... | 08/28/2007 |
| 7245851 | Electrophotographic apparatus In an electrophotographic apparatus having a blue (purple) semiconductor laser as a light source, the electrophotographic apparatus has an electrophotographic photosensitive member, a charging means, an exposure means, a developing means, a transfer means and a dest... | 07/17/2007 |
| 7245073 | Quinoxaline derivatives, and light emitting element using thereof It is an object to provide an organic compound that has a bipolar property and also a light emitting property, and further has heat resistance. A quinoxaline derivative represented by a general formula (1) is provided. In the formula, A represents any one of ... | 07/17/2007 |
| 7223507 | Imaging members A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, charge transport components, and a certain electron transport component, and a certain polymer binder. ... | 05/29/2007 |
| 7220523 | Bridged charge transport materials having two bicyclic heterocycle hydrazones Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the ... | 05/22/2007 |
| 7217483 | Electrophotographic photoreceptor, drum cartridge employing the electrophotographic photoreceptor, and image-forming apparatus The present invention provides an electrophotographic photoreceptor which has high light resistance, has high durability in exposure to oxidizing gases such as ozone and NOx, is excellent in mechanical properties such as printing durability, wearing resis... | 05/15/2007 |
| 7214259 | Inks containing water-soluble perylene dyes and their use in ink-jet printing An ink comprising a liquid medium and a colorant, wherein the liquid medium comprises water and a water-miscible organic solvent and the colorant is of Formula (1), wherein the colorant is dissolved in the liquid medium: Formula (1) wherein: each independently is a ... | 05/08/2007 |
| 7214457 | Organic photoconductor, process cartridge, image forming apparatus and image forming method An organic photoconductor including a charge generating layer and a charge transport layer on a conductive base, wherein crossing angleθ of two tangent lines is 70° or more, two tangent lines which border on a curve drawn by plotting integrated values of detected ... | 05/08/2007 |
| 7211359 | Coating solution containing cocrystals and or crystals of a charge-generation pigment or a mixture of charge-generation pigments A method for preparing a coating solution containing a cocrystallized titanyl phthalocyanine-titanyl fluorophthalocyanine, the method comprising: dry milling a charge-generation pigment or mixtures of charge-generation pigments; increasing the amorphousness of the p... | 05/01/2007 |
| 7198814 | Compositions, methods for producing films, functional elements, methods for producing functional elements, method for producing electro-optical devices and methods for producing electronic apparatus In accordance with the invention, a composition including a solvent and a functional material is prepared. The solvent includes at least one heterocyclic compound having one or more substituents and containing an oxygen atom as a constituent atom. The functional mat... | 04/03/2007 |
| 7192677 | Electrophotographic photoconductor An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which contains a phthalocyanine pigment and a disazo pigment of formula (I): wherein A and ... | 03/20/2007 |
| 7189483 | Charge transport materials having heteroaromatic hydrazone groups An improved organophotoreceptor includes an electrically conductive substrate and a photoconductive element on the electrically conductive substrate where the photoconductive element comprises: a) a charge transport material having... | 03/13/2007 |
| 7186490 | Photosensitive material, electrophotographic photoreceptor using the material, and electrophotographic image forming method and apparatus using the photoreceptor A titanyl phthalocyanine crystal having an X-ray diffraction spectrum having a plurality of diffraction peaks in which a maximum diffraction peak is observed at a Bragg (2 θ) angle of 27.2°±0.2° and a diffraction peak is observed at a lowest Bragg (2θ) angle of... | 03/06/2007 |
| 7179574 | Hydrazone-based charge transport materials Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the ... | 02/20/2007 |
| 7175958 | Electrophotographic photoconductor, process for forming an image, image forming apparatus and process cartridge for the same An electrophotographic photoconductor contains a conductive support; and a photoconductive layer disposed on the photoconductive support; wherein the photoconductive layer contains an azo compound expressed by a general formula ArN═N—C... | 02/13/2007 |
| 7175956 | Organic photoconductive material, electrophotographic photoreceptor comprising the same, and image-forming apparatus The invention is to provide an organic photoconductive material capable of realizing electrophotographic photoreceptors of high reliability that have high charge potential, high sensitivity, good responsiveness to light and good durability, of which the characterist... | 02/13/2007 |
| 7175954 | Electrophotographic photoreceptor An electrophotographic photoreceptor comprising a support and a photosensitive layer is disclosed. The photosensitive layer contains a mixture of compounds represented by Formula (1) having different n and (Rp+Rs) is not more than 99%, wherein Rp is a ratio of a com... | 02/13/2007 |
| 7173805 | Polymer material A polymer material comprising a polyol and at least one alkaline salt. The polyol comprises at least one moiety selected from the group consisting of ethylene glycol, di(ethylene glycol), tri(ethylene glycol), tetra(ethylene glycol), poly(diethylene glycol), poly(et... | 02/06/2007 |
| 7169521 | Hydrazone-based charge transport materials Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the ... | 01/30/2007 |
