Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4333976 | Composite woven or knitted fabric Woven or knitted fabrics of soft touch and elegant appearance composed of yarns including bundles of superfine fibers of less than 0.7 denier which are at least partly bound with a cured silicone polymer.... | 06/08/1982 |
| 4320634 | Thermal-fusible tape of a warp knitted fabric This invention relates to a thermal-fusible tape used to adhere two fabrics together, and used especially to hem slacks. The adhesive tape of the present invention consists of a warp knitted tape, and at least one thermal adhesive thread which longitudinally e... | 03/23/1982 |
| 4305824 | Cellulose derivative reverse osmosis membrane Cellulose derivative reverse osmosis membrane containing tetracarboxylic acid and mono- or divalent carboxylic acid.... | 12/15/1981 |
| 4304731 | Method for producing an aliphatic triisocyanate A novel aliphatic triisocyanate, 1,6,11-undecanetriisocyanate having the formula, ##STR1## is produced by phosgenation of 1,6,11-undecanetriamine or its salts. The phosgenation is carried out in one step method or a multi-step method.... | 12/08/1981 |
| 4302493 | Dense, elegant and pliable sheet material comprising fibrous base impregnated with a diol-hindered amine polyurethane system A composite sheet material comprising a fibrous sheet which is impregnated and/or coated with a polyurethane elastomer, wherein said polyurethane elastomer comprises the reaction product of (A) a polymeric diol having a molecular weight of about 800-5000, (B) ... | 11/24/1981 |
| 4301136 | Process for continuous graphitization of graphitizable precursor fibers An improved process for manufacturing high-grade and high-quality graphite fibers by the steps of (a) heating carbon fibers from acrylic fibers in an initial heating zone while exposed to an atmosphere of inert gas having a maximum temperature from about ... | 11/17/1981 |
| 4299702 | Liquid separation apparatus Disclosed is a liquid separation apparatus of spiral type including a membrane module comprising a hollow mandrel having at least a hole, at least one pair of semipermeable membrane sheets and at least one pair of first and second spacing layers, said mem... | 11/10/1981 |
| 4299945 | Thermoplastic polyamide imide copolymers and method of preparation Thermoplastic polyamide imide copolymers are provided which are excellent in both heat stability and melt viscosity characteristics at a temperature of from about 300° C. to about 400° C., and method of preparation.... | 11/10/1981 |
| 4290927 | Vulcanizable polyblend An intimate polyblend of about 5-90% by weight of a thermoplastic copolyester or block copolyester elastomer and about 95-10% by weight of a vulcanizable synthetic or natural rubber. The preferred copolyester is a copolyester of polybutylene terephthalate... | 09/22/1981 |
| 4290935 | Highly rigid polyamide composition A highly rigid poly-&3xb5;-caproamide composition containing about 50 to 5000 ppm of barium combined with the poly-&3xb5;-caproamide, and having a γ-type crystal ratio of about 0.3 to 0.7 is disclosed. The polyamide has improved rigidity without loss of ... | 09/22/1981 |
| 4289475 | Steam vaporization of oil For use as a replacement for existing gas to burners, oil having an API gravity of about 10-80 is preheated and mixed with about 0.1 to 1 pound of steam per pound of oil, at a pressure of about 30-150 pounds per square inch gauge. The resulting mixture is... | 09/15/1981 |
| 4289875 | Process for continuous filtration and aging of xanthated alkali cellulose A process for the continuous filtration and aging of a viscose solution comprising xanthated alkali cellulose (XAC) is described wherein the XAC is continuously passed in a downstream direction through a series of aging tanks and a series of filter means.... | 09/15/1981 |
| 4287721 | Chemical heat pump and method A concentrated saline solution is used to store solar energy for both heating and cooling. A small, uninsulated tank is used to store the desiccant solution so that the heat pump can operate at night or during extended periods when the sun is obscured. No... | 09/08/1981 |
| 4288457 | Ethynylbenzene compounds and derivatives thereof Novel ethynylbenzene compounds and derivatives are described. Their use in the treatment of inflammation is also disclosed.... | 09/08/1981 |
| 4286014 | Composite sheet material A polyurethane elastomer which comprises a reaction product of (A) a polymeric diol having a molecular weight of about 800-5000, (B) a mixture of organic diisocyanates wherein about 2-70 mol % is composed of aliphatic diisocyanate (said aliphatic diisocya... | 08/25/1981 |
| 4286018 | Biaxially oriented poly-p-phenylene sulfide films A biaxially oriented poly-p-phenylene sulfide film comprising recurring units of the formula ##STR1## a melt viscosity of more than 100 poise and less than 600,000 poise at a shear rate of 200 sec-1 and at 300° C., and a specific gravity ... | 08/25/1981 |
| 4283823 | Method of making an actuating member for a thermostatically controlled valve A thermostatically controlled valve, of the type used in a cooling system of an internal combustion engine, has a temperature-responsive actuating member, for opening and closing the valve, in the form of a metal coil having shape memory effect such that ... | 08/18/1981 |
| 4284696 | Light transmission particle for forming color image Disclosed is a light transmission particle containing a colorless sublimable dye, an acyl leucophenoxazine compound suitable for use in the formation of a color image. This particle can produce a clear color image having little fogging and having an excel... | 08/18/1981 |
| 4284540 | Polyethylene terephthalate molding compositions Impact-modified and moldability-improved polyethylene terephthalate molding compositions are provided which comprise polyethylene terephthalate resins, a copolymer of -olefins and glycidyl esters of ,ଲ-ethylenically-unsaturated carboxy... | 08/18/1981 |
| 4284765 | Automatic aging analyzer using a motor having a constant torque This invention relates to a process and apparatus for the manufacture of viscose products which includes a motor means having a constant torque in the viscose during ripening wherein the resistance on said motor means changes as the viscose ripens because... | 08/18/1981 |
| 4282964 | Article transfer device A device for transferring articles arriving in transverse rows on a feed conveyor, especially confectionery goods, such as chocolate bars or wafers, pralines, etc., to at least two processing sites. The transfer device includes a transfer belt pivotably m... | 08/11/1981 |
| 4276228 | 1,6,11-Undecane triisocyanate There is provided a novel aliphatic triisocyanate, 1,6,11-undecanetriisocyanate having the formula, ##STR1## and a method for production of the same. The novel triisocyanate is produced by reacting 1,6,11-undecanetriamine or its salts with phosgene.... | 06/30/1981 |
| 4275156 | Glucose isomerase immobilized product and process for preparing same An enzymatically active product for use in isomerization of glucose into fructose is provided. The active product comprises an organic polymeric material predominantly comprised of a monovinyl aromatic compound polymer having ଲ-aminopropionamidometh... | 06/23/1981 |
| 4275195 | Process and apparatus for expediting the mercerization of alkali cellulose A process and apparatus for making alkali cellulose having a desired predetermined degree of polymerization in which cellulose is steeped in an alkali hydroxide bath, generally 17-25% sodium hydroxide, and then passed through an RF treatment chamber where... | 06/23/1981 |
| 4271318 | Process for preparing amino schiff base or corresponding diamino ketone An ω-lactam having 4-12 carbon atoms, an oligomer thereof or a ring-opened polymer or an ω-amino carboxylic acid corresponding thereto, is heated in the presence of water and a metallic carbonate compound to obtain a metallic salt of ω-amino carboxylic... | 06/02/1981 |
| 4269973 | Process and apparatus for making alkali cellulose in sheet form Improved process and apparatus for making alkali cellulose comprises continuously steeping indefinite length sheets of cellulose in an alkali hydroxide bath, generally 17-25% sodium hydroxide, and then passing the cellulose strip through a chamber where i... | 05/26/1981 |
| 4268557 | Process and mold for producing padded seat backs, and the product obtained A process and mold for producing padded motor vehicle seat backs containing a metal framework surrounded by polyurethane foam in a plastic coating. The framework is inserted through a slit in the coating which is then sealed. Then the polyurethane foam is... | 05/19/1981 |
| 4267874 | Expandable burglar proof window An adjustable window guard and screen apparatus includes an adjustable framework of two sections slidably mated to each other. Also, at least one set of screen members, and a plurality of bar members are affixed to the framework and are expandable or cont... | 05/19/1981 |
| 4266921 | Method and apparatus for the manufacture of concrete and like products A method and apparatus is provided for the manufacture of products of concrete or like construction, in which a mixture of calcareous cementitious binder substance, such as cement, an aggregate, a vinyl acetate-dibutyl maleate copolymer, and an amount of ... | 05/12/1981 |
| 4265788 | Adsorbent for separating para-xylene, and process for the preparation thereof An adsorbent for separating para-xylene from C8 aromatic hydrocarbons, specifically a faujasite zeolite which contains potassium, zirconium and proton or ammonium as cation, process for separating para-xylene, and process for making the adsorbe... | 05/05/1981 |
| 4265276 | Plastic tube having a crosslinked thin layer on the surface Polyvinyl chloride tube having a crosslinked thin layer of about 0.1 to about 1 micron in thickness at least on its inner surface, thereby substantially reducing the migration and volatilization of plasticizers and other additives from the polymeric mater... | 05/05/1981 |
| 4264392 | Process for forming a peelable seal A process for forming a peelable seal by heat sealing under combined application of heat and pressure at least two polyolefin film members having at least one oxidized surface therebetween, and the seal formed thereby.... | 04/28/1981 |
| 4264476 | Catalyst for producing acrylonitrile in a fluidized bed reactor An improved catalyst suitable for use in the production of acrylonitrile by the catalytic ammoxidation of propylene in a fluidized bed reactor is provided. This catalyst contains 40 to 60% by weight of silica, in terms of SiO2 , and 60 to 40% b... | 04/28/1981 |
| 4263368 | Process for producing a potentially bulky yarn A process for producing a potentially bulky yarn which is a substantially non-interlaced multifilament yarn of a thermoplastic synthetic fiber satisfying the characteristic values of Rmax /Rࣘ2.5, ƊS5 ࣙ1.5, ƊS50 ࣘ3.... | 04/21/1981 |
| 4262078 | Light transmitting particle for forming color image Disclosed is a light transmitting particle containing a sublimable color-former that is a pyridine derivative suitable for use in the formation of a color image. This particle can produce a clear color image having little fogging and having an excellent r... | 04/14/1981 |
| 4259905 | Waterless planographic printing plate with polysiloxane coating A waterless planographic printing plate having toner image areas of ink receptivity and non-image areas of ink releasability is provided, which plate has a substrate and an overlying layer coated on the substrate. The overlying layer is predominantly comp... | 04/07/1981 |
| 4260739 | Process and apparatus for preparing a homogeneous solution of xanthated alkali cellulose Process and apparatus for treating xanthated alkali cellulose solution so as to form a homogeneous solution by continuously passing a xanthated alkali cellulose solution through a series of attrition and mixing stages and partially diluting the solution i... | 04/07/1981 |
| 4258542 | Bundle of fibrous elements Disclosed is a bundle of fibrous elements, at least some of which are uneven in the thickness in the axial direction thereof, namely some of which include thick portions having a larger sectional area and thin portion having a smaller sectional area. In t... | 03/31/1981 |
| 4257938 | Purification method of human fibroblast interferon A method for the purification of human fibroblast interferon by the successive treatments of a crude interferon solution with a strongly acidic ion exchanger and a chelating carrier which contains a chelating residue chelated with at least one metal ion s... | 03/24/1981 |
| 4257967 | Catalyst composition and method for oxidation of ethylene to ethylene oxide and method of catalyst manufacture A catalyst composition is provided comprising reduced silver combined with at least one carbonate of a rare earth metal and yttrium, at least one salt of an alkali or alkaline earth metal, and a catalyst carrier, wherein the carbonate is prepared by the r... | 03/24/1981 |
