Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 6924322 | Thio-,amine-,nitro-,and macrocyclic containing organic aerogels & xerogels An organic aerogel or xerogel formed by a sol-gel reaction using starting materials that exhibit similar reactivity to the most commonly used resorcinol starting material. The new starting materials, including thio-, amine- and nitro-containing molecules and functio... | 08/02/2005 |
| 6828354 | Hydrophilic open-cell, elastic foams with a melamine/formaldehyde resin base, production thereof and use thereof in hygiene products Hydrophilic open-celled resilient foams comprising melamine-formaldehyde resins, obtainable by (a) heating and crosslinking an aqueous solution or dispersion each containing at least a melamine-formaldehyde precondensate, an emulsi... | 12/07/2004 |
| 6613809 | Metal-doped organic gels and method thereof Disclosed herein is a sol-gel polymerization process for synthesizing metal-doped organic gels. The process polymerizes metal salts of hydroxylated benzenes or hydroxylated benzene derivatives with alkyl or aryl aldehydes to form metal-doped, wet, organic... | 09/02/2003 |
| 6087407 | Flexible aerogel composite for mechanical stability and process of fabrication A flexible aerogel and process of fabrication. An aerogel solution is mixed with fibers in a mold and allowed to gel. The gel is then processed by supercritical extraction, or by air drying, to produce a flexible aerogel formed to the shape of the mold. T... | 07/11/2000 |
| 5973015 | Flexible aerogel composite for mechanical stability and process of fabrication A flexible aerogel and process of fabrication. An aerogel solution is mixed with fibers in a mold and allowed to gel. The gel is then processed by supercritical extraction, or by air drying, to produce a flexible aerogel formed to the shape of the mold. T... | 10/26/1999 |
| 5705535 | Method for the subcritical drying of aerogels Process for the preparation of aerogels by subcritical drying of inorganic and organic hydrogels and lyogels to give aerogels, dielectric drying methods being used.... | 01/06/1998 |
| 5338819 | Solid isocyanate derivatives useful in one component polyurethane adhesives Solid isocyanate-terminated prepolymer powders useful in preparation of films, coatings, and one-component adhesives are prepared by reacting a low molecular weight di- or polyisocyanate with a glycol mixture in a solvent in which the isocyanate is solubl... | 08/16/1994 |
| 5232955 | Process for producing a high strength artificial (cast) stone with high permeability and filter effect The invention relates to a process for producing a highstrength a furan stone with high permeability and filtering effect mainly for protecting deep-drilled wells yielding mineral oil, natural gas and water against getting choked by sand. A mixture compri... | 08/03/1993 |
| 5190985 | Stable aminoplast cellular foams and the process for their manufacture Stable, emission-free, low-shrinkage, fireproof aminoplastic cellular foams are obtained by using an unsaturated, halogenated polyalcohol in the resin precondensate constituent and a dodecylbenzolsulphonic acid partially esterified preferably with a fatty... | 03/02/1993 |
| 5118722 | Method of producing elastic foams having a base of polyurethane by microwave foaming A method of producing elastic foam having a base of polyurethane, in particular for use in the field of automobiles for sound damping. Allows production of foam parts directly in a desired shape in as few operations as possible. The foam is formed from a ... | 06/02/1992 |
| 4986908 | Organic-based porous microspheres for HPLC Porous organic microspheres for use in HPLC are formed by coacervating a colloidal silica sol in a uniform mixture of the sol and a polymerizable organic material. The silica particles which formed the sol are removed from the microspheres with ammonium b... | 01/22/1991 |
| 4939182 | Melamine-alkanolamine condensates and polyurethanes prepared therefrom Condensates of certain amino-substituted s-triazines, formaldehyde and alkanolamines are disclosed. These condensates can be used, with or without alkoxylation, in forming polyurethanes having desirable burn properties.... | 07/03/1990 |
| 4902413 | Organic-based porous microspheres for HPLC Porous organic microspheres for use in HPLC are formed by coacervating a colloidal silica sol in a uniform mixture of the sol and a polymerizable organic material. The silica particles which formed the sol are removed from the microspheres with ammonium b... | 02/20/1990 |
| 4753746 | Urea-formaldehyde foam detergent and method of manufacture using a thixotropic agent The invention is directed to a detergent and a method of producing the same. The detergent is for textile surfaces and especially for textile floor coverings. The detergent includes a pulverized, porous carrier including a foamed, plastified urea-formalde... | 06/28/1988 |
| 4708967 | Thermosetting resin binder particles and methods for making waferboard Spray dried thermosetting resin powders in an intermediate polymeric stage are produced in the form of hollow, thick-walled, macrospherical particles having a bulk density greater than about 35 lbs/ft3 and having particle diameters predominantl... | 11/24/1987 |
| 4655952 | Detergent and method for producing the same The invention is directed to a detergent and a method of producing the same. The detergent is for textile surfaces and especially for textile floor coverings. The detergent includes a pulverized, porous carrier including a foamed, plastified urea-formalde... | 04/07/1987 |
| 4604448 | Moulding compositions from melamine-formaldehyde resoles A moulding composition which forms stable, durable mouldings which are color stable, have good water resistance and can be glass clear and fire-resistant, comprises a melamine-formaldehyde resole of mole ratio melamine:formaldehyde in the range 1:1.1 to 1... | 08/05/1986 |
| 4576972 | Closed cell phenolic foam This invention relates to the manufacture of foam from phenolic resins and to the foam so produced. In order to overcome some of the limitations of the prior art closed cell phenolic foams, we have developed a method of preparing closed cell foams from mo... | 03/18/1986 |
| 4546119 | Closed cell phenolic foam This invention relates to the manufacture of foam from phenolic resins and to the foam so produced. In order to overcome some the the limitations of the prior art closed cell phenolic foams, we have developed a method of preparing closed cell foams from m... | 10/08/1985 |
| 4544676 | Sound-insulating leather powder compositions The invention relates to new sound- and heat-insulating compositions, which comprise a finely dispersed leather powder of animal origin, a phenoplast resin or an aminoplast resin and optionally, together with the latter one, urea and/or a modified furane ... | 10/01/1985 |
| 4540717 | Resilient foam based on a melamine-formaldehyde condensate A resilient foam, based on a melamine-formaldehyde condensate, which exhibits a number of important performance characteristics, namely: (a) low bulk density (b) low heat conductivity (c) low compressive strength (d) low modulus of elasticity (e) large deflection o... | 09/10/1985 |
| 4537913 | Method of preparing a urea-formaldehyde combination foam that is low in formaldehyde A U.F. foam that is diamensionally stable, but low in formaldehyde, was made by adding to a conventional solution of a urea formaldehyde resin precondensate, before foaming, up to 50% urea, relative to the solid resin substance, and one or several connect... | 08/27/1985 |
| 4530940 | Stabilized melamine resin foams Stabilized melamine resin foams contain, as a stabilizer, a copper or iron compound in an amount corresponding to from 10 ppm to 3%, based on the weight of the melamine resin, of Cu or Fe, preferably an oxide, hydroxide or carbonate of copper.... | 07/23/1985 |
| 4522878 | Material having high mechanical strength and density close to unity, the manufacture and uses thereof A material with high mechanical strength and a density close to 1 is obtained by: (a) dispersing on weight basis 10-15% of a melamine-formol resin, 10-50% of hollow microspheres, and optionally up to 60% of light aggregates, in water; (b) mixing the resul... | 06/11/1985 |
| 4511678 | Resilient foam based on a melamine-formaldehyde condensate A resilient foam, based on a melamine-formaldehyde condensate, which exhibits a number of important performance characteristics, namely: (a) low bulk density (b) low heat conductivity (c) low compressive strength (d) low modulus of elasticity (e) large deflection o... | 04/16/1985 |
| 4490486 | Formaldehyde immobilization method Residual formaldehyde contained in urea formaldehyde structures is immobilized by subjecting the structure to a gaseous mixture of a carrier/penetrating gas and a reactive gas chosen from the group consisting of anhydrous ammonia, ozone and mixtures there... | 12/25/1984 |
| 4489175 | Method of producing a urea formaldehyde combination foam with a low content of formaldehyde To obtain a UF foam which is low in formaldehyde, yet is dimensionally stable, up to 96% urea is dissolved in an approximately 10 to 30% aqueous extract of an alkyl, aryl or alkaryl sulphonic acid, said solution being mixed with a conventional hardener/fo... | 12/18/1984 |
| 4480055 | Process for manufacturing modified amino-resin products Amino-resin products, which include aminoplast foams, can be modified by reacting an aminoplast precondensate, which contains an excess of formaldehyde or to which supplemental formaldehyde or another lower monoaldehyde or dialdehyde has been added before... | 10/30/1984 |
| 4467054 | Foams based on low formaldehyde-emission urea-formaldehyde resin and process for their preparation Composition based on a urea-formaldehyde polycondensate, suitable for the preparation of solid foams to be used as thermal insulating materials, characterized in that said composition contains hexamethylenetetramine in quantities comprised between 2% and ... | 08/21/1984 |
| 4448687 | Process for the production of semipermeable polybenzimidazole membranes with low temperature annealing A membrane cast in the form of either a hollow filament or a flat film formed of a polybenzimidazole polymer is subjected to an annealing process by contacting the membrane with an annealing medium comprised of a solvent for the polymer and water. Such an... | 05/15/1984 |
| 4403013 | Thermosetting resin glues foamable to high density A glue foamable to high density comprises an aqueous alkaline thermosetting resin and a surfactant comprising (1) a fatty acid amide of the alkanol-amines or (2) a tertiary amine oxide used in amount sufficient to render the glue foamable to a stable foam... | 09/06/1983 |
| 4390643 | Process for producing amine formaldehyde resin foam A process for producing amine formaldehyde resin foam by using a precondensate for the amine formaldehyde resin, a foaming agent, a surfactant and a curing agent is disclosed. Said process is characterized in that the foaming agent is selected from the gr... | 06/28/1983 |
| 4366264 | Use of calcium metasilicate (wollastonite) as a formaldehyde suppressant for urea formaldehyde resins Formaldehyde suppression is accomplished in urea formaldehyde foamed insulation by adding, prior to the foaming, a small but effective amount of a formaldehyde off-gassing suppressant, which is calcium metasilicate.... | 12/28/1982 |
| 4356275 | Aminoplast foams Aminoplast foams of hardened reaction products of aldehydes and at least bifunctional modified ,ω-ureas which contain at least one ether, thioether, acetal, ester, ester amide and/or carbonate group and have a molecular weight of from 200 to 10,00... | 10/26/1982 |
| 4346181 | Method of reducing formaldehyde emissions from formaldehyde condensation polymers A method of reducing the formaldehyde emissions from formaldehyde condensation polymers is disclosed. A substance having two or more amide linkages, such as a polyacrylamide polymer is incorporated in the polymer solution immediately or shortly before use... | 08/24/1982 |
| 4345061 | Process for the preparation of phenol-urea-formaldehyde condensation products This invention relates to cellular plastic compositions of condensation products of phenol-urea and formaldehyde useful for thermal and acoustical insulation and methods for their preparation in which the phenol is present in amounts of about 1 to about 2... | 08/17/1982 |
| 4334971 | Manufacture of resilient foams based on a melamine-formaldehyde condensate A process for the manufacture of a resilient foam based on a melamine-formaldehyde condensate, wherein an aqueous or alcoholic solution or dispersion containing a melamine-formaldehyde precondensate, an emulsifier, a blowing agent and a hardener is foamed... | 06/15/1982 |
| 4307201 | Highly adsorptive macroporous polymers A method for preparing macroporous aminotriazine-aldehyde resins by reaction in the presence of an acid catalyst and a miscible porogen. The resin product has high surface area and porosity and displays excellent sorption capacity.... | 12/22/1981 |
| 4299925 | Resin foams Here is described the manufacture of a cured urea/formaldehyde resin foam having a shrinkage on drying of less than 20% by volume, by a method which includes the step of producing a homogeneous wet foam from an aqueous resin solution and an aqueous soluti... | 11/10/1981 |
| 4291128 | Process for making urea-formaldehyde insulation A process and apparatus are provided for making desired shapes of urea-formaldehyde suitable for use as insulation from urea-formaldehyde foam. Fluid urea-formaldehyde foam (A) is formed into discrete particles (A') in particle generator (10) which also p... | 09/22/1981 |
