Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8167989 | Compound of di (nitrate) acetylacetonatobis (1,10-phenanthroline) lantanoid (III), applicable for luminescent additive to ink, and ink for hidden marking of valuables description The invention refers to new chemical compounds belonging to the known class of REE mixed ligand complexes, namely, to the compound of di-(nitrate)acetylacetonatobis (1,10-fenantrolin)lanthanide (III) of the general formula [Ln(NO3)2Acac(Phen)2]*H20, where... | 05/01/2012 |
| 8114207 | Marker solution to be applied by means of an inkjet printer The invention relates to a marker solution which is to be applied by means of an inkjet printer and contains (i) at least one organic solvent that has a greater steam pressure than water at 20° C. and a water content of less than 50 percent (v/v), (ii) predefined f... | 02/14/2012 |
| 7337969 | Method for improving the readability of composite images A method for improving the readability of composite images by determining available areas on a document where no text or graphics will be printed in visible ink and printing one or more 2-D bar code with invisible ink at a size pre-determined based on the available ... | 03/04/2008 |
| 7297454 | Colorless inkjet ink compositions for improved image quality A colorless ink jet ink composition is provided for printers for printing on both porous and hybrid glossy or semi-glossy media. The ink composition comprises a water soluble polymer or dispersed latex. The ink formulation provides substantially air fast, stain resi... | 11/20/2007 |
| 7291214 | Ink, ink set, ink jet recording method, ink cartridge and ink jet recording apparatus An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy can improve the ink ejection stability. An ink to be used in an ink jet recording method of ejecting an ink from a recording head through actio... | 11/06/2007 |
| 7289103 | Computer system interface surface with reference points and processing sensor A method and system for enabling user interaction with computer software running in a computer system. A user is provided with an interface surface containing information relating to the computer software and including coded data indicative of an identity of the int... | 10/30/2007 |
| 7259890 | Printing with custom colorant materials A method for printing with a custom colorant material stored in a container having a memory storage element. The memory storage element includes information related to the custom colorant material. In the method, the information is received from the memory storage e... | 08/21/2007 |
| 7206433 | Method for printing high information density machine-readable composite images A method for printing a large invisible luminescent bar code on a mail piece addresses the problem of obscuration of modules by printed text such as the address. The bar code is printed large enough so that the line width of the characters is substantially less than... | 04/17/2007 |
| 7192471 | Aryl-ureido benzoxazinone compounds Fluorescent pigment compounds comprising aryl-ureido benzoxazinone compounds of the general formula (I): wherein R1 is an substituted or unsubstituted aryl group, R2 and R3 are ea... | 03/20/2007 |
| 7108742 | Ink compositions containing lanthanide complexes The invention relates to an ink composition containing (a) a compound of formula (I), Lm−Ln3+(Ch−)n (I), wherein Ln represents a lanthanide, CH− is a negatively charged ligand containing at least one UV ab... | 09/19/2006 |
| 7021539 | Ballot system and method adapted for optical scanning A ballot system including a printed ballot wherein the locations intended for marking voter choices are pre-treated with invisible ink, the remainder of the ballot being untreated; a marking pen containing an activating chemical which makes the invisible ink change ... | 04/04/2006 |
| 6964992 | Ink jet recording medium comprising amine-treated silica This invention pertains to an ink jet recording medium comprises a flexible substrate and a coating composition coated on at least one surface of the substrate, wherein the coating composition comprises the product formed from the contact between fumed silica partic... | 11/15/2005 |
| 6949600 | Alumina filled wood finish composition In an exemplary embodiment of the present invention, a coating composition for wood products including urethane polymers and fumed alumina is provided. In another exemplary embodiment of the present invention, a method for improving the abrasion resistance of... | 09/27/2005 |
| 6949598 | Polymer compositions containing colloids of silver salts The present invention relates to antimicrobial compositions, methods for the production of these compositions, and use of these compositions with medical devices, such as catheters, and implants. The compositions of the present invention advantageously provide varyi... | 09/27/2005 |
| 6933329 | Composition based on water-dissipatable polyurethane A composition comprising water-dissipatable polyurethane, water, colorant, a water-miscible organic solvent and a water-immiscible organic solvent. The compositions are useful as inks for ink jet printers. ... | 08/23/2005 |
| 6926766 | Ink for thermal ink jet printing with high performance at high ejection frequencies This invention relates to a water-based ink for ink-jet thermal printing containing a surface-active agent having, at a certain concentration, a slow dynamic rearrangement. This surfactant system gives the ink a high surface tension under dynamic conditions which gr... | 08/09/2005 |
| 6924835 | Method and apparatus for fault tolerant data storage on photographs A method of printing digital data onto a photograph using infra-red ink and using an ink jet printing process as is disclosed. The data can store the details of an image taken by a camera and of a second image which has been transformed by a proprietary image proces... | 08/02/2005 |
| 6908505 | Thermochromic compositions of color formers and lewis acids Thermochromic compositions that include combinations of at least one color former and at least one Lewis acid in a polymer mixture are disclosed. The thermochromic compositions reversibly change appearance from substantially transparent to substantially non-transpar... | 06/21/2005 |
| 6905538 | Invisible ink jet inks Water-based invisible red fluorescent inks provide machine-readable, inverse contrast invisible images and can be printed using conventional ink jet printers. The inks employ rare earth complexed ligand fluorophores having narrow excitation and emission spectra. In ... | 06/14/2005 |
| 6861012 | Latent inkjet formulation and method A latent or “invisible ink” security marking formulation is provided using a phosphor with distinct emissions characteristics including visible emission due to excitation at a particular invisible wavelength. An insoluble inorganic phosphor with this or a simila... | 03/01/2005 |
| 6846350 | Red luminous ink composition Disclosed is a red luminous ink composition comprising a europium complex represented by the formula: wherein R1 is a hydrogen atom or a substituent selected from the group consisting of an alkyl group havin... | 01/25/2005 |
| 6802992 | Non-green anti-stokes luminescent substance Non-green anti-Stokes luminescent material, comprising the elements Ln, erbium (Er) and ytterbium (Yb), Ln representing at least one element which is selected from the group consisting of yttrium (Y), gadolinium (Gd), scandium (Sc) and lanthanum (La), a process for ... | 10/12/2004 |
| 6770687 | Water-based dual security ink A water-based security printing ink is provided with two means of security. The use of a variable light absorbing and/or transmitting pigment or dye is a first security and a water repelling agent is provided as a second security. Visible images can be generated fro... | 08/03/2004 |
| 6743283 | Blue luminous ink composition Disclosed is a blue luminous ink composition comprising a luminous compound represented by the formula: wherein R1 is a group selected from the group consisting of a hydrogen atom, an alkyl group having from 1... | 06/01/2004 |
| 6610351 | Raman-active taggants and their recognition An organic or organoelement, linear or branched, monomeric or polymeric composition of matter having a Raman-active component in the form of particles. The particles having a maximum dimension of 50 μm. The Raman-active compound is applied to a substrate... | 08/26/2003 |
| 6478861 | Laser markable coating The present invention provides a transparent or colorless coating comprising a heat responsive material that increases in opacity when exposed to heat. An example of a heat responsive material is an inorganic compound or an organic resin. The present inve... | 11/12/2002 |
| 6318265 | Inking system including reusable paper and water-humectant ink A special ink consists of water and a humectant. A reusable paper includes a surface darkened by a water-insoluble material and a coating covering the darkened surface. The coating is made of a material that scatters light when dry and that becomes at lea... | 11/20/2001 |
| 6299674 | Fingerprint developing agent and method for developing fingerprints A fingerprint detecting agent and a fingerprint detecting method using the agent, which can be used to detect latent fingerprints being in a wet condition, the fingerprint detecting agent includes a fixer containing silicone series compound, fluoride seri... | 10/09/2001 |
| 6261348 | Laser markable coating The present invention provides a transparent or colorless coating comprising a heat responsive material that increases in opacity when exposed to heat. An example of a heat responsive material is a silicate or a titanate. The present invention further pro... | 07/17/2001 |
| 6210472 | Transparent coating for laser marking The present invention provides a transparent coating comprising a resin and a heat responsive material that increases in opacity when exposed to heat. Preferably, the transparent coating is free or substantially free of a pigment or dye. An example of a h... | 04/03/2001 |
| 6159274 | Coloring mechanism and a recording material with the mechanism The present invention provides a coloring mechanism in which hidden letters (including numbers), figures, symbols, images etc. appear by rubbing the surface with metal such as coins etc., and to a recording material provided with this mechanism. In the co... | 12/12/2000 |
| 6153123 | Sulfur-containing phosphor powders, methods for making phosphor powders and devices incorporating same Sulfur-containing phosphor powders, methods for making phosphor powders and devices incorporating same. The powders have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention permits the cont... | 11/28/2000 |
| 6150494 | Polymers containing optical brightener compounds copolymerized therein and methods of making and using therefor The invention relates to a polymer prepared from the repeat units of residues of a monomer of at least one dicarboxylic acid or ester; a monomer comprising a diol, diamine or a mixture thereof; a monomer comprising at least one sulfonate group and at leas... | 11/21/2000 |
| 6149719 | Light sensitive invisible ink compositions and methods for using the same A high-reliability invisible ink printing system is provided which generates high-definition, lightfast images that are easily read or otherwise detected using far red, infrared, and/or ultraviolet light. The inks contain an uncomplexed invisible metal ph... | 11/21/2000 |
| 6106110 | Secure thermal ink jet printing composition and substrate and method and apparatus utilizing same A composition and a method and an apparatus for using the composition for secure thermal ink jet printing on a substrate. The thermal ink jet ink composition is clear and is invisible to an unaided human eye in visible light when printed on the substrate.... | 08/22/2000 |
| 5935308 | Latent image jet inks A latent image printing process by applying to a substrate a latent image ink composition containing zinc bromide with an ink jet printer. Subsequently, the latent image is activated to render it visible, by application of an activator.... | 08/10/1999 |
| 5935755 | Method for document marking and recognition Disclosed is a process which comprises (a) applying to a recording sheet a marking material comprising a Raman-detectable component which, when irradiated with monochromatic radiation, exhibits a detectable Raman spectrum, thereby forming a mark on the re... | 08/10/1999 |
| 5880176 | Fluorescent marking composition and fluorescent mark formed by said composition A fluorescent marking composition containing particles of an organic material which has a glass transition temperature of at least 30° C. and an average particle size of at least 30 nm, and emitting fluorescence in a visible light range, or absorbing inf... | 03/09/1999 |
| 5837042 | Invisible fluorescent jet ink The present invention provides jet ink compositions suitable for producing security markings on documents and other articles for subsequent identification. The jet ink composition comprises a fluorescent colorant, an ink carrier, and optionally one or mor... | 11/17/1998 |
| 5720801 | Water resistant security ink composition A leach resistant ink composition including a diphenyl guanidine compound, an acid, and a resin. The ink composition may further include a glycol and an alcohol and can be printed on paper, such as, for example, in the word "VOID". If bleach is used to at... | 02/24/1998 |
