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| Number | Title | Issue Date |
| 5107120 | Passive infrared detector A passive infrared detector, including a pyroelectric sensor with three pairs of contiguous, active elements and a Fresnel lens with a plurality of segments each of which has an optical center and an equivalent focal length, each pair of active elements d... | 04/21/1992 |
| 4963607 | Compositions and methods using organosulfides for stabilization of polyolefins against photodegradation Polyolefins are stabilized against the harmful effects of U.V.-light by incorporating therein certain organosulfides. The organosulfides may be used alone or in synergistic combination with two classes of known light stabilizers, namely the benzophenones ... | 10/16/1990 |
| 4956494 | Oxidation of thiols, disulfides and thiolsulfonates Alkanesulfonic acids and alkanesulfonyl chlorides, free of undesirable side products arising from side-chain chlorination, are prepared by oxidation with hydrogen peroxide of the corresponding alkanethiol, dialkyldisulfide or alkyl alkanethiolsulfonate mi... | 09/11/1990 |
| 4954542 | Tetrahalophthalate esters as flame retardants for polybutylene terephthalate resins (PBT) Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for polybutylene terephthalate (PBT) resins.... | 09/04/1990 |
| 4954811 | Penetration sensor A penetration sensor is disclosed which contains first and second transducers sandwiched around a layer which capacitively isolates the individual transducers. This sensing arrangement allows for the operational state of the sensor to be tested by applyin... | 09/04/1990 |
| 4950364 | Process for the separation of 1,1-dichloro-1-fluoroethane and 1,1,1,3,3-pentafluorobutane 1,1-Dichloro-1-fluroethane and 1,1,1,3,3-pentafluorobutane are separated from their liquid mixtures, such as liquid mixtures resulting from the hydrofluorination of 1,1,1-trichloroethane or vinylidene chloride. 1,1-Dichloro-1-fluoroethane and 1,1,1,3,3-pe... | 08/21/1990 |
| 4944853 | Photochemical preparation of 3-(organothio) aldehydes A process is disclosed for the preparation of 3-(organothio)aldehydes by reacting a mercaptan with an , ଲ-unsaturated aliphatic aldehyde under actinic radiation in the absence of an oxygen-containing gas wherein the mercaptan and aldehyde are... | 07/31/1990 |
| 4938945 | High purity anhydrous FeF3 and process for its manufacture Anhydrous ferric fluoride of 99.0% purity or greater, based upon F- analysis is afforded, as well as a process for its manufacture using anhydrous FeCl3 and liquid anhydrous HF, reacted in the substantial absence of O2, H | 07/03/1990 |
| 4938894 | Tetrahalophthalate esters as flame retardants for ABS (acrylonitrile-butadiene styrene terpolymer) resins Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for ABS (acrylonitrile-butadienestyrene terpolymer) resins.... | 07/03/1990 |
| 4937385 | Process for the manufacture of dialkyl disulfides and polysulfides A process is disclosed for continuously preparing dialkyl disulfides and dialkyl polysulfides by reacting at elevated temperature and in the presence of a solid, particulate catalyst an alkene and hydrogen sulfide in a first reaction zone, and then passin... | 06/26/1990 |
| 4931019 | Electrostatic image display apparatus An electrostatic image display apparatus which uses piezoelectric film to enable a user to form images on a screen. The apparatus is contained within a housing. Supported within the housing is a common electrode. A layer of piezoelectric film is separated... | 06/05/1990 |
| 4926650 | Refrigerant fluid and method of use A refrigerant fluid and system containing and utilizing such fluid in which the fluid consists essentially of a mixture of trichloromonofluoromethane and 1-chloro-1,1-difluoroethane.... | 05/22/1990 |
| 4927873 | Halophenyl ester flame retardants for polyphenylene ether resins Flame retardancy of polyphenylene ether resins is increased by blending with the resin a flame retarding amount of a halophenyl hydrocarbyl ester. The ester is preferably the reaction production of a halogenated phenol, preferably a bromophenol, and a hyd... | 05/22/1990 |
| 4927891 | Polymer bound light stabilizer coating resins Acrylic coating resins with attached light stabilizer functional groups are provided. The polymer bound light stabilizer coating resins are prepared by reacting light stabilizer hydrazides, LS--C(.dbd.0)--NR3 --NH2, with an acrylic p... | 05/22/1990 |
| 4925903 | Process of making a polymer containing hindered amine light stabilizing groups and polymer made thereby Compounds which contain peroxide linkages and the radical of a hindered amine light stabilizer group are provided. These compounds function as polymerization initiators which cause the hindered amine stabilizer to be chemically bound to the polymer.... | 05/15/1990 |
| 4923917 | Tetrahalophthalate esters as flame retardants for styrene-maleic anhydride copolymer (SMA) resins Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for styrene-maleic anhydride (SMA) resins.... | 05/08/1990 |
| 4923916 | Tetrahalophthalate esters as flame retardants for polystyrene resins Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for polystyrene resins.... | 05/08/1990 |
| 4923506 | Polyhydroxy polymer delivery systems A controlled release composition of biologically active materials is prepared by reacting a biologically active agent, aqueous polyhydroxy polymer, inorganic salt, and optional filler(s), drying the product and then grinding the product to the desire part... | 05/08/1990 |
| 4915947 | Microencapsulated fungicide There are disclosed microcapsules containing a phytotoxic compound of the formula: ##STR1## where x is oxygen or sulfur and R is alkyl, alkoxy, alkylamino, halo, nitro or hydrogen, and the microcapsule walls comprise resinous polycondensates whi... | 04/10/1990 |
| 4912158 | Tetrahalophthalate esters as flame retardants for polycarbonate resins Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for polycarbonate resins.... | 03/27/1990 |
| 4910335 | Decolorization of alkanesulfonic and arenesulfonic acids A method for decolorizing color contaminated alkanesulfonic or arenesulfonic acids represented by Formula I: RSO3 H I comprises mixing the color contaminated acid with an effective amount of a dialkanes... | 03/20/1990 |
| 4906280 | Tertiary butylhydrazides as plant growth regulators T-butylhydrazides of carboxylic acid anhydrides and carboxylic acid chlorides useful as plant growth regulants in the free acid form or their equivalent salts.... | 03/06/1990 |
| 4904894 | Hail sensor A hail sensor is disclosed which contains a piezoelectric transducer positioned to produce an output signal when it is vibrated by a hailstone. In one embodiment, the transducer is mounted on a perforated member which is exposed to falling precipitation. ... | 02/27/1990 |
| 4904795 | Halogen substituted phthalimide flame retardants Novel halogen-substituted phthalimides are provided which are the reaction product of a halogenated phthalic anhydride with an alkoxylated amine or the reaction product of a halogenated phthalic anhydride with a siloxy amine. The halogen-substituted phtha... | 02/27/1990 |
| 4904739 | Poly(fluoroacetylene) containing polymers Compositions of poly(fluoroacetylene) useful for providing electrically conductive properties to plastics by a method of dehydrofluorination of saturated fluoroethylene polymers.... | 02/27/1990 |
| 4904222 | Synchronized sound producing amusement device An amusement device is disclosed which contains a signal generator attached to a flexible member. When the flexible member is repeatedly waved, an oscillatory electrical signal is produced by the signal generator and supplied to a sound generator which pr... | 02/27/1990 |
| 4902804 | Multifunctional thiadiazole lubricant additives The reaction products of the alpha-halogenated half esters or amides of succinic acid and thiadiazole dimercaptides as new compositions of matter and their use as lubricant additives possessing multifunctional properties such as extreme pressure, antiwear... | 02/20/1990 |
| 4899249 | Fluorine-containing dielectric media and capacitors employing such media A dielectric medium composition comprising a fluorine-containing amide or a fluorine-containing sulfonamide and capacitors or other electric devices incorporating said composition, are disclosed herein.... | 02/06/1990 |
| 4895977 | Purification of alkanesulfonic acids using ozone The removal of oxidizable organic impurities which include alkylthiolsulfonate from alkanesulfonic acids by treatment with an ozone containing gas is disclosed. The treated products have improved color and odor and exhibit improved long-term color stabili... | 01/23/1990 |
| 4891144 | Polymers and lubricant additives of alkylene dithiothiadiazoles and alkylene cyanodithioimidocarbonates Oil soluble lubricant additives produced by the reaction of dimercapto thiadiazoles or cyanodithioimidocarbonate polymers with a polyalkenylenesuccinimide, an aliphatic carboxylic acid and a mercaptan are disclosed.... | 01/02/1990 |
| 4888090 | Etchant for aluminum containing surfaces and method A stable aqueous etchant for aluminum containing surfaces and method of etching such surfaces.... | 12/19/1989 |
| 4885347 | Polymer containing hindered amine light stabilizing groups and process of making the same Compounds which contain peroxide linkages and the radical of a hindered amine light stabilizer group are provided. These compounds function as polymerization initiators which cause the hindered amine stabilizer to be chemically bound to the polymer.... | 12/05/1989 |
| 4881794 | Low smoke and reduced flame fluorinated polymer compositions and cable constructions Fluorinated polymer based compositions which include aluminum silicates and electrical and fiber optic cable constructions made from such compositions have improved low smoke and flame retardant properties.... | 11/21/1989 |
| 4876048 | Purification of alkanesulfonyl chlorides An ozone-containing gas is used for removing oxidizable odorous impurities and color from alkanesulfonyl chlorides.... | 10/24/1989 |
| 4874803 | Dianhydride coupled polymer stabilizers The present invention comprises reaction products resulting from the reaction of hydrazido-substituted or certain amino-substituted polymer stabilizers and cyclic dianhydrides, as well as the use of such products. The polymer stabilizers of the invention ... | 10/17/1989 |
| 4870868 | Vibration sensing apparatus A sensing device is disclosed which produces a response when the point of impact between an object and a member occurs at a preselected location on the member. When the member vibrates after being impacted by the object, an oscillatory electrical signal i... | 10/03/1989 |
| 4869844 | High solids liquid alkaline cleaners An ultra-high solids, stable, liquid, highly alkaline caustic cleaner containing 40 to 80 weight percent total solids having 5 to 42 weight percent of an inorganic particulate material dispersed therein, such as an alkaline silicate, that is nonreactive a... | 09/26/1989 |
| 4868246 | Polymer bound UV stabilizers Ultraviolet light stabilizers are chemically bound to anhydride containing polymers or copolymers. The polymeric stabilizers are prepared by the reaction of primary amino or hydrazido-substituted UV absorbers with some or all of the anhydride groups of th... | 09/19/1989 |
| 4866136 | Process for producing polymer bound hindered amine light stabilizers N-(polyalkyl-4-piperidinyl)imide containing polymer is prepared by blending together a mixture of a polymer containing anhydride functions and a 4-amino-polyalkylpiperidine or its 1-alkyl or 1-acyl derivatives and heating said materials in the blend, eith... | 09/12/1989 |
| 4863999 | Multipurpose polymer bound stabilizers Polymer bound stabilizer compounds are provided in which two or more different classes of stabilizers are chemically bound to anhydride containing polymers or copolymers. The polymeric stabilizers are prepared by the reaction of primary amino or hydrazido... | 09/05/1989 |
