Famous Patents
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 |
| 4420068 | Combination carrying case and detachable garment carrier A soft-sided carrying case or travel bag having individual business document and paraphenalia storage compartments, an umbrella storage retainer, and a compartment suitable for storing clothes is combinable with an improved garment bag which may be folded... | 12/13/1983 |
| 4405054 | Container including pressure mounted inner cover A container for a cream, gel, or the like, includes a bottle or jar, a top or primary cap, and a secondary or inner cover which is positioned over a top opening in the jar and compressed into sealing engagement therewith by the closure of the cap on the j... | 09/20/1983 |
| 4354542 | Handbag Improvements in a handbag or the like are disclosed which include an additional umbrella compartment adjacent the bottom of the bag being accessible through an opening in the bottom surface of the bag. The additional, out-of-the-way compartment is formed ... | 10/19/1982 |
| 4306366 | Display card with movable extending member A card for displaying price or other graphic information is mountable on a price rail of a conventional store display shelf, stand, or the like, and includes a central information carrying portion, and opposed tabs extending therefrom which are adapted to... | 12/22/1981 |
| 4301113 | Circulation system for biocidal gas In the treatment of articles with a sterilant gas such as an alkylene oxide, and the circulation of the gas throughout a treatment chamber containing the articles to be treated, a gas circulating system completely devoid of electrical contacts, switches, ... | 11/17/1981 |
| 4283829 | Protective device for mounting blades on arrowhead A spool-like protective device facilitates the mounting of a plurality of razor-sharp broadhead blades on an arrowhead while protecting a user's hands from being cut by the blades. The body of the device includes a tapered central bore adapted to receive ... | 08/18/1981 |
| 4282081 | Double junction reference electrode A highly stable, double-junction, modular reference electrode for assay of low-level halide concentrations, sulfides, perchlorates, silver, mercury, and other heavy metals, and including upper and lower axially in-line, readily accessible and conveniently... | 08/04/1981 |
| 4270363 | Refrigerating machine including energy conserving heat exchange apparatus An improved commercial cube/crushed ice making machine includes a refrigeration unit having a water-to-refrigerant heat exchange condenser operatively connectible to an external water supply for heating water therein. The condenser provides for improved e... | 06/02/1981 |
| 4264479 | Surfactant system An improved surfactant system comprising a mixture of a non-ionic detergent, a tertiary amine oxide or amphoteric detergent, and a quaternary ammonium halide. The surfactant system of the invention is combined with other ingredients to yield 14 different ... | 04/28/1981 |
| 4232047 | Food supplement concentrate in a dense glasseous extrudate A food supplement concentrate of an ingestible agent such as a seasoning, flavoring, oleoresin, essential oil, vitamin, mineral, and mixtures thereof encapsulated, enveloped or otherwise encased as a dispersed microphase within but recoverable from a matr... | 11/04/1980 |
| 4230687 | Encapsulation of active agents as microdispersions in homogeneous natural polymeric matrices A method for effectively encasing an active agent such as a chemical compound, a seasoning, a flavoring, or a nutrient such as vitamins and minerals, including liquids, as a time-stable but releasable dispersion in a homogeneous polymeric encapsulating ma... | 10/28/1980 |
| 4225255 | Liquid flow controlling dispensing plug for wipe-on applicator A fluid-flow-regulating contact applicator consisting of a plug or sleeve secured as a closure for a liquid dispensing bottle or similar container. The applicator is formed with a plurality of liquid-permeable ducts extending through a top wall thereof to... | 09/30/1980 |
| 4221495 | Roll-on applicator with sharp sealing ring A roll-on type applicator assembly including a ball-type plastic fitment secured to the collar of a liquid dispensing container, and a closure therefor. The fitment includes an integrally formed sealing ring which constitutes a sharp rim formed at the int... | 09/09/1980 |
| 4221494 | Roll-on applicator with spring bar ball supports A roll-on applicator including a fluid container surmounted by a fitment of a plastic composition and retaining an applicator ball. A closure cap, detachably secured, constitutes a cover for the fitment. With the cap removed and the applicator assembly in... | 09/09/1980 |
| 4203872 | Surfactant system An improved surfactant system comprising a mixture of a non-ionic detergent, a tertiary amine oxide or amphoteric detergent, and a quaternary ammonium halide. The surfactant system of the invention is combined with other ingredients to yield 14 different ... | 05/20/1980 |
| 4194808 | Wave guide for surface wave transmission of laser radiation Apparatus and method for transmission of laser radiation in the infrared portion of the spectrum. A 10.6 μm laser beam is focused tangentially upon an inner surface of an elongated synclastic wave guide having a generally oval cross-section, and an outpu... | 03/25/1980 |
| 4180405 | Heat-sensitive recording composition with mixed color precursors A heat sensitive recording member capable of acquiring a stable color in selected regions contrasting with the background color of the coated substrate upon exposing these regions to an elevated temperature and comprising a paper or polymeric film substra... | 12/25/1979 |
| 4174304 | Surfactant system An improved surfactant system comprising a mixture of a non-ionic detergent, a tertiary amine oxide, and a quaternary ammonium halide. The surfactant system of the invention is combined with other ingredients to yield 14 different commercially useful clea... | 11/13/1979 |
| 4160760 | Process for preparing polyacrylonitrile doped with Prussion blue A method for interacting Prussian blue with polyacrylonitrile in the presence of dimethylformamide to produce a polymer solid exhibiting a high degree of color fastness, levelness, and stability and having enhanced and highly useful electrical properties.... | 07/10/1979 |
| 4151327 | Complex amine/silane treated cellulosic materials Paper, cotton cloth, wood, fiberboard, and other cellulosic products are first treated with an organic base and then treated with a halosilane. This results in the formation of an amine/silane complex within the cellulose fibers as well as on the surface ... | 04/24/1979 |
| 4135033 | Heat-activated adhesive coating A two-layer adhesive coating having a dry, non-tacky surface convertible to a permanently adhesive surface by application of heat. A first co-reactant in an adhesive-containing base layer combines with a second co-reactant applied to the base layer to for... | 01/16/1979 |
| 4124903 | Safety garment for automobile repairs A one-peice garment adapted to cover the clothing of a wearer during emergency automobile repairs on the highway, and in other situations where a high degree of wearer visibility is desirable. The fabric of the garment is impregnated with a luminescent or... | 11/14/1978 |
| 4114112 | Apparatus and method for efficient synthesis of laser light Apparatus and method for synthesizing laser light characterized by a plurality of discrete wavelengths, without competition among different wavelengths. A preferred embodiment of the invention includes a laser resonator having an optical cavity bounded by... | 09/12/1978 |
| 4113900 | Curl-resistant adhesive-coated paper A flat, water-remoistenable, adhesive-coated paper having superior resistance to curling ordinarily accompanying changes in atmospheric humidity. A powdered adhesive is mixed with a solution of triethanolamine plasticizer in toluene and methanol to form a... | 09/12/1978 |
| 4111703 | Heat-sensitive coating composition with 4-aromatic and hydroxy substituted piperidine derivative and cyclic polyketo compound A heat-sensitive coating adapted to acquire a stable color contrasting with the background color in selected regions that are heated to an elevated temperature. The coating comprises (1) a piperidine derivative substituted in the 4 position with an aromat... | 09/05/1978 |
| 4104006 | Wind-energy conversion device A wind-powered device having a pair of flaps affixed to a rotatable axle which is coupled to a cable. The device is suitable for use in gusty winds prevailing at ground level, thereby obviating high towers required for conventional wind-energy conversion ... | 08/01/1978 |
| 4101852 | Microacoustic shear bulk wave device A microacoustic signal processing device for propagation of shear bulk waves in a substrate. A preferred embodiment of the device includes a substrate having opposed, polished principal and second surfaces. An input interdigital transducer supported on th... | 07/18/1978 |
| 4099556 | Variable thermal conductance reflux heat pipe A thermal energy transfer device having controllably variable thermal conductance comprises a reflux heat pipe having a capillary wick therein, an evaporator and a condenser zone, a circulating supply of working fluid which is controlled by a bendable sec... | 07/11/1978 |
| 4097288 | Heat sensitive recording composition containing a complexed phenolics and a spiropyran or leuco lactone A heat-sensitive recording composition containing normally colorless lactones or spiropyran compounds in combination with hydrogen bonded molecular complexes of phenolic compounds having a dissociation temperature ranging from 50° to 220° C. The composi... | 06/27/1978 |
| 4096477 | Identification system using coded passive transponders An identification system including a transmitter, a receiver, a decoding subsystem, and a passive transponder identifier. One passive transponder identifier of the invention is a surface acoustic wave device provided with pad means for applying and removi... | 06/20/1978 |
| 4094687 | Heat-sensitive recording composition A heat reactive recording composition capable of acquiring a stable color in selected regions contrasting with the background color of the sheet upon exposing these regions to an elevated temperature and comprising a paper or polymeric film substrate and ... | 06/13/1978 |
| 4095103 | Apparatus and method for determination of residual stress in crystalline substances Apparatus and method for determination of residual stress in crystalline substances. An X-ray source is focused at two different, preselected angles with respect to a surface of a substance, and X-ray diffraction peaks are located with a single position-s... | 06/13/1978 |
| 4093227 | Target with improved shock absorber means A marksmanship target supported by a moveable support arm, with a shock absorber interposed between the target and support arm. The shock absorber includes eight thin, resilient ribs extending from a circular hub mounted on the support arm to a marginal e... | 06/06/1978 |
| 4065409 | Hard surface detergent composition An improved detergent mixture for cleaning hard surfaces comprising a mixture of a non-ionic detergent, a tertiary amine oxide, and a quaternary dimethyl ammonium halide. The mixture having a particular combination of ingredient concentrations described e... | 12/27/1977 |
| 4061135 | Binocular endoscope A binocular endoscope for diagnostic work, medical treatment and surgical procedures providing depth perception in the image of an object viewed. Image transmittal from the viewed object to the viewing station is through a non-distorting, high resolution,... | 12/06/1977 |
| 4054679 | Steam injection and flash heat treatment of isoelectric soy slurries A process for preparing a soy protein product having a high concentration of both solubilized carbohydrates and soluble protein, and being characterized by substantial freedom from bacterial activity, absence of objectionable beany flavor, light color, su... | 10/18/1977 |
| 4051380 | Apparatus and method for supporting and positioning the body to facilitate radiographic mammography procedures A stretcher-like table or cradle for use as a body support during radiological examination. The table includes means whereby it may be arcuately pivotally manipulated about each of two mutually perpendicular horizontal axes. For specific uses in mammograp... | 09/27/1977 |
| 3995826 | Pellet mold A molding apparatus for producing pellets from a fused material such as molten lead. The mold is characterized in that in use it is submersed in and then closed while in the molten mass. Thereafter, the closed mold is removed from the melt, cooled to set ... | 12/07/1976 |
| 3994697 | Fuel distributed solid lubricant for internal combustion A solid lubricant consisting of metals combined with a high lubricity salt fabricated in pellet form and introduced into the fuel reservoir of an internal combustion engine. The pellet slowly disintegrates to produce extremely minute solid particles which... | 11/30/1976 |
| 3989461 | Apparatus for use, recovery, reconstitution, and recyclization of sterilant gas mixture Apparatus and method for the recovery, reconstitution and recyclization of a gaseous mixture used as a sterilizing medium. A recycle line interconnects a gas condenser with a sterilization chamber to return a portion of the gases discharged from the chamb... | 11/02/1976 |
