William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 4877674 | Direct overwrap for bar soap A single piece non-wrinkling wrapper for bars of soap is made from a lamina of sheets of a flexible plastic film and a water absorbent paper. The film and paper are superimposed and bonded together along their margins by bands of adhesive. The exposed sur... | 10/31/1989 |
| 4877680 | Recording medium with non-porous ink-receiving layer A recording medium comprising a substrate and a non-porous ink receiving layer is provided. The ink receiving layer contains a water-insoluble polymer containing a cationic resin. The recording medium may be employed for recording by attaching droplets of... | 10/31/1989 |
| 4877678 | Sheet material for ink-jet printing The printing sheet of the invention comprises a base sheet and two successive coating layers provided thereon, of which the first coating layer, which serves as a water-absorbing layer, is formed of a dispersion of a powdery highly water-absorptive resin,... | 10/31/1989 |
| 4871601 | Optical information recording carrier An optical information recording carrier comprises an optical recording layer provided on a transparent substrate, a film coating layer laminated with out adhesion on said optical recording layer, and further a fixing layer laminated thereon to fix said f... | 10/03/1989 |
| 4868025 | Cushioned bag and apparatus and method of making a cushioned bag A cushioned bag has two adjacent multilayered sections comprising an outer layer of flexible thermoplastic material, a middle layer (or partial middle layer) of polyolefin film, and an inner layer of cushioning material. The sections are fused together al... | 09/19/1989 |
| 4868581 | Ink-receiving composite polymer material There are disclosed an ink-receiving composite polymer material wherein a nonvolatile organic compound is caused to penetrate into and diffuse through an ink-receiving polymer forming, from any one surface side thereof, and a recording medium for ink-jet ... | 09/19/1989 |
| 4868050 | Interleaf-containing, fiber-reinforced epoxy resin prepreg Disclosed is an interleaf-containing, fiber-reinforced epoxy resin prepreg, which comprises a fiber-reinforced epoxy resin matrix and an interleaf composed of a polyimide film subjected to a corona discharge treatment and/or a matting treatment. This prep... | 09/19/1989 |
| 4863768 | Heat shrinkable cylindrical laminated film A heat shrinkable cylindrical laminated film having a polyvinylidene chloride type resin (I) as an oxygen gas barrier core layer, on the both surface side of which 1 or 2 resin layers are arranged respectively and consisting of 3-5 layers with total, char... | 09/05/1989 |
| 4857387 | Compensating element for stresses of thermal or mechanical orgin, especially for printed circuits, and process for making such an element employed in a printed circuit A printed circuit comprising an electrically insulating substrate and an electrically conductive layer on the substrate, this layer being a pseudo-elastic or elastically deformable alloy that undergoes significant deformations in a reversible manner and i... | 08/15/1989 |
| 4853283 | Light reflective laminate A light reflective material is manufactured using a novel transfer process to provide a final product comprised of a metal substrate, an adhesive on the substrate, a light reflective metal layer (e.g. silver) on the adhesive and a thin (e.g. 0.05 to 0.2 m... | 08/01/1989 |
| 4853284 | Mechanical part A mechanical part brought into contact with a member selected from the group consisting of paper, rubber, plastics, resin, ceramics, and metal, comprises a substrate of an iron series metal and a surface layer formed on a surface of the substrate and cont... | 08/01/1989 |
| 4842948 | Methods and compositions for producing polyimide coatings Methods and compositions for producing imide precursors and polyimide coating and adhesives. Basically a mixture of an oxoimine such as caprolactam, a dianhydride such as 3,3', 4,4'-benzophenone tetracarboxylic acid dianhydride and a solvent such as dimet... | 06/27/1989 |
| 4842944 | Elastic rotatable member An elastic rotatable member, includes an elastic rubber layer, a surface layer of resin formed on the elastic layer, wherein the surface layer is provided by applying resin material together with liquid to a surface of the elastic rubber layer and sinteri... | 06/27/1989 |
| 4842908 | Insulation with tape adhering surface Improveds insulation segments for fluid conduits such as pipes and ducts, having a nontacky moisture resistant strip which extends along edges of the insulation which are adapted to be secured to other portions of the insulation, or to other insulation se... | 06/27/1989 |
| 4837063 | Optical recording material An optical recording material comprising a recording layer containing a substance with its optical properties changeable by irradiation with light in which information is recorded by irradiating the recording layer with light, said substance being an ethy... | 06/06/1989 |
| 4830906 | Magnetic recording medium A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic particles and a binder, wherein said magnetic layer contains at least one compound selected from the group consisting of an amm... | 05/16/1989 |
| 4828901 | Injection-moulded article and a process for the production thereof An invention relates to new injection-moulded articles made from metal/plastic composite systems containing a polyurethane adhesive (intermediate) layer, and a process for the preparation thereof.... | 05/09/1989 |
| 4824716 | Impermeable encapsulation system for integrated circuits An impermeable encapsulation system for integrated circuit chips utilizes a polyimide-siloxane block copolymer as an undercoat applied to the chip surface and an impermeable outer coat comprised either of a non-reactive metal, such as titanium, tantalum o... | 04/25/1989 |
| 4822662 | Machine parts with wear-resistant surface brought into contact with elongated fibrous member Machine parts to be brought into contact with an elongated fibrous member each consists of a substrate of an iron series metal and a surface layer which has high wear-resistance and a good sliding property, and which contains chromium oxide as a major con... | 04/18/1989 |
| 4816435 | Transfer sheet for thermal transfer recording A transfer sheet for thermal transfer recording system having a color material layer containing sublimable dyes on one surface of a base film, and said color material layer is a black color material layer containing sublimable dyes represented by followin... | 03/28/1989 |
| 4816308 | Multilayered container A biaxially oriented multilayered container consisting of a body portion and a mouth portion. The body portion comprises one or more layers of a thermoplastic gas-barrier resin B and layers of a thermoplastic resin A other than the resin B which are large... | 03/28/1989 |
| 4816338 | Glassy carbon-coated article A glassy carbon-coated article contains a graphite substrate and a glassy carbon coating applied on the graphite substrate. The coating has a thickness of 15 to 200 microns. The glassy carbon is obtained by heating a raw material containing a thermal deco... | 03/28/1989 |
| 4808463 | Substrate for magnetic disks A substrate for magnetic disk comprises a ceramic support having a glaze layer formed on the surface which is to be coated with a magnetic recording material. The ceramic support may be made of alumina, and the glaze layer is made of a material having sub... | 02/28/1989 |
| 4804581 | Chip resistant coatings A coated article having improved chip resistance and a method of providing such a chip resistant coated article are disclosed. The article includes a metal substrate, a coating layer of an elastomer-modified epoxy derived from a polyepoxide and from 5 to ... | 02/14/1989 |
| 4803119 | Ink compositions for impact typewriter ribbons Disclosed is an ink coating composition for impact printing ribbons comprised of a sponge with an ink composition dispersed therein, which ink is comprised of pigment particles and a dimer acid.... | 02/07/1989 |
| 4801497 | Recording medium A recording medium comprises an ink receiving layer provided on a substrate, wherein said ink receiving layer contains a cationically modified product of polyvinyl alcohol and a water soluble polymer having no active hydrogen.... | 01/31/1989 |
| 4784896 | Heat transfer recording sheet A heat transfer recording sheet comprising (A) a substrate film, and (B) formed on at least one surface of the substrate film, a film of an acrylic resin having recurring units represented by the following formula (1) ##STR1## wherein R1 ... | 11/15/1988 |
| 4780347 | Pipe insulation for cold weather applications An insulation system for pipes which includes segments of fiberglass insulation or other mineral fiber slit along their length for surrounding the pipe, a butt strip tape for sealing abutting ends of the segments of insulation, and means for sealing a fla... | 10/25/1988 |
| 4775588 | Metal substrates having hydrophilic resin paints containing finely divided ion exchange resins on its surface A hydrophilic film-forming composition which comprises a resin paint comprising a resin binder component and a paint vehicle with a solid ion exchange resin powder dispersed in the vehicle. A film produced therefrom has durable hydrophilic properties, and... | 10/04/1988 |
| 4774134 | Low oxygen barrier type plastic closure with an adhered gasketing compound and method of forming same A container closure formed from a thermoplastic polyolefin, e.g. polypropylene, which has been molded and adheres simultaneously to a coated foil, e.g. an aluminum insert, to which a conventional plastisol gasketing compound may be adhered to provide a he... | 09/27/1988 |
| 4769258 | Multiple-time ink-bearing medium for thermal printing A multiple-time ink-bearing medium containing a thermally-transferable ink for thermal printing, produced in a process comprising: preparing a resin solution of a water-soluble resin comprising polyvinyl alcohol as a major constituent; preparing a fusible... | 09/06/1988 |
| 4756963 | Protective member and print protection method using the same A protective member is provided which comprises a substrate and a transfer layer provided releasably thereon, the transfer layer comprising at least a fluorescent whitening agent, an ultraviolet light absorber, and a light stabilizer. A method for protect... | 07/12/1988 |
| 4756961 | Recording member and recording method using the same A light-transmissive recording member comprises a light-transmissive substrate and an ink acceptor provided on said substrate, wherein powdery particles are imparted onto the surface of said ink acceptor.... | 07/12/1988 |
| 4755410 | Adhesive copper strip with an opaque covering An adhesive copper strip is provided with an opaque covering on the adhesive side thereof. The opaque covering may be provided in one of two ways. In one embodiment, a coating of black acrylic or epoxy is applied to the copper strip beneath the adhesive l... | 07/05/1988 |
| 4748073 | Perpendicular magnetic recording medium with multilayered protective layer A perpendicular magnetic floppy disk has a base layer on each side of which a recording layer is formed having an axis of easy magnetization in a direction perpendicular to its surface. A multilayered protective layer structure is provided on the recordin... | 05/31/1988 |
| 4746559 | Magnetic recording medium Disclosed is a magnetic recording medium comprising a non-magnetic support having provided thereon a ferromagnetic metal thin film provided with a layer containing a compound having a mercapto group. This layer may also contain an ester bond. The magnetic... | 05/24/1988 |
| 4741947 | Water-based epoxy patterned porous insulation An adhesive solid emulsion, containing both high and low epoxy equivalent weight epoxy solids, a curing agent and an optional emulsifying agent, in a carrier containing at least about 55 weight percent water is continuously coated on at least one side of ... | 05/03/1988 |
| 4737409 | Heat-resistant resin molded article with excellent abrasion resistance and process for producing the same A heat-resistant resin molded article excellent in abrasion resistance, surface smoothness, solvent resistance, durability and adhesiveness between base material and cured film, consisting of (1) a resin molded article composed of 2% by weight or more of ... | 04/12/1988 |
| 4737408 | Magneto-optical recording medium having plasma-polymerized protective layers In a magneto-optical recording medium comprising a perpendicular magnetizable thin film layer formed from an amorphous rare earth metal-transition metal alloy on a substrate with or without an intermediate layer, and a first protective layer formed from a... | 04/12/1988 |
| 4734328 | Crystalline random propylene copolymer composition and composite laminate comprising said composition A crystalline random propylene copolymer composition comprising (i) a crystalline random propylene copolymer comprising 99 to 85 mole % of propylene and 1 to 15 mole % of an alpha-olefin other than propylene and (ii) a random 1-butene copolymer comprising... | 03/29/1988 |