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 |
| 4499135 | Gaskets A paper-based gasket is impregnated with a silicone resin to improve resistance to water/antifreeze mixtures. The gasket is made from paper essentially free from amine-containing material such as wetting agent and is bonded with a sulphur-free or sulphur ... | 02/12/1985 |
| 4444841 | Extruded AES film An extruded AES film in which the AES contains 15-30% rubber having a thickness of 1 to 10 mils, and a laminate of such film to another material, such as a metallic or cellulosic base.... | 04/24/1984 |
| 4394416 | Film-paper fiber layer laminate and process for preparation thereof Disclosed is a film-paper fiber layer laminate comprising a film and a very thin paper fiber layer bonded to the surface of the film. This laminate is prepared by bonding films to both surfaces of a paper so that the adhesive bond strength between the fil... | 07/19/1983 |
| 4374461 | Method of constructing tire and identification tag therefor Method of constructing pneumatic tire where at least one of its elements is comprised of a heat-curable rubber composition, an improvement in which such composition is identified with a releasably attached identification tag containing an information-prov... | 02/22/1983 |
| 4331728 | Laminate made of a cellulose acetate layer and an elastomeric material layer An osmotic system for delivering a beneficial agent is disclosed. The system comprises a wall surrounding a compartment and has a passageway through the wall for delivering agent from the compartment. The wall is formed of a material permeable to the pass... | 05/25/1982 |
| 4309470 | Methods and means for minimizing floor dust problems A method of binding floor dust and other particles in building rooms, corridors etc. by means of floor mats, where initially a number of test mats are placed on the floor, these mats being clean and white and apart from the color being of a material corre... | 01/05/1982 |
| 4302513 | Elastic typing medium for reduction of message size During manufacture, a rubber or other elastic sheet is forcibly stretched out and smoothly affixed to an adhesive spread out on a backing of cardboard or similar material. The sheet is suitable for receiving typing from a typewriter, and the entire assemb... | 11/24/1981 |
| 4279964 | Froth coating of paper products and process for forming same A froth coated paper substrate in which the froth coating may be densified by compression when applied as a frothed resinous emulsion to improve opacity and ink-holdout of the substrate, or applied as a frothed surface size when the coating is a frothed a... | 07/21/1981 |
| 4265976 | Radiation-curable coated article having moisture barrier propetes This invention provides an ultraviolet radiation-curable coating composition which after curing has utility as a moisture barrier film for the protection of substrates such as paper and cardboard. Illustrative of the invention radiation-curable composition is ... | 05/05/1981 |
| 4240860 | Latex-based adhesives Two preformed materials such as paper, fabrics, glass, sheet metal, at least one of which is pervious to water vapor, are joined together with a solvent-free adhesive based on a latex of a rubbery polymer. The latex is one which is stabilized with an emul... | 12/23/1980 |
| 4239008 | Lightweight railway car hatch cover A set of hinged covers adapted to sealably close the rectangular hatch on the roof of a railway hopper car having a coaming running along the hatch perimeter. Each cover has a vaulted formation to shed water, the long edges of the cover being rolled to de... | 12/16/1980 |
| 4202803 | Rubber composition containing ground graminaceous rice product especially for manufacturing molded panels A composition for the manufacture of a vulcanized rubber includes, in addition to elastomers, vulcanizing agents, anti-ageing agents and other known additives, a filler comprising finely-divided, dry waste products from the extraction of grain from cereal... | 05/13/1980 |
| 4147831 | Pressure-sensitive adhesive compositions Pressure-sensitive adhesive compositions having improved adhesion characteristics in water comprising an elastomeric mixture consisting of natural rubber and polyisobutylene, a liquid plasticizer component and a solid tackifier component.... | 04/03/1979 |
| 4123582 | Building form for molded articles having a urethane coating A building form and method of preparing molded articles thereon which comprises molding an article on the casting surface of a building form comprising a casting surface adhered to a water destructible support layer, the said casting surface comprising a ... | 10/31/1978 |
| 4115614 | Bonding layers for lining articles with a chlorinated polyethylene material A duo bonding layer for adhering a chlorinated polyethylene layer or coating to a rubber-lined article. The first bonding layer contains a blend of material having from 75 to 25 percent of chlorinated polyethylene by weight and from 25 to 75 percent by we... | 09/19/1978 |
| 4109041 | Construction panel with non-skid surface and method of fabrication Elastomeric particles, e.g., rubber grindings and buffings produced in vehicular tire manufacturing and recapping operations, are incorporated into at least one surface of particle-board panel to increase friction, prevent stacked panels from sliding in e... | 08/22/1978 |
| 4086386 | Smash-recoverable printing blanket A smash-recoverable printing blanket having a substantially uniform thickness and method of making same are provided wherein the blanket comprises a plurality of layers including at least one layer adapted to swell upon being contacted by a liquid and a p... | 04/25/1978 |
| 4054718 | Heat-sensitive recording material containing a malachite green color former A heat-sensitive recording material which contains as color former at least one compound of the general formula ##STR1## wherein R1 and R2, which can be the same or different, represent hydrogen, alkyl of at most 12 carbon atoms... | 10/18/1977 |
| 4049853 | Terrazzo structure having a sub-surface and an intermediate impermeable sheet An improved terrazzo floor or wall construction of reduced thickness bonded and adhesively secured to an underlying sub-surface through the medium of an intermediate liquid impermeable sheet. A frangible terrazzo veneer is bonded to the liquid impermeable... | 09/20/1977 |
| 4045608 | Friction facing with porous sheet base Porous friction facing materials containing cellulose fibers are coated with an impregnant of ethyl silicate to provide automatic transmission clutch plate and band linings of improved frictional properties, durability, wear and heat resistance, without u... | 08/30/1977 |
