Abstract: In a system for transmitting digital information, transmitter operating parameters (503) are transmitted with other communication message information (501, 505, 507, 509, 511, 513, 515, and 517) to aid communications.

Abstract: A clear or colorless coating that is free of yellow discoloration, and a method for the production thereof, utilizing a pyrazole compound as a blocking agent for the blocked polyisocyanate employed in the coating composition.

Abstract: Transmission of candidate-sector signalling channels are synchronized to facilitate mobile-assisted handoff (MAHO) measurements by a mobile (125). Transmitters in candidate sectors each transmit their signalling channel at distinct frequencies and at predetermined intervals. The transmission of each signalling channel by each candidate sector transmitter is synchronized to provide a known reference to the mobile (125). When instructed, the mobile (125) need only to perform MAHO measurements at the predetermined intervals in the order and at the frequency instructed.

Abstract: This invention relates to a process for coating a substrate comprising contacting the substrate with a low volatile organics, moisture curable, two-component coating composition comprising an admixture of an A-side and a B-side, said A-side comprising an aliphatic polyisocyanate having an isocyanate index relative to the number of isocyanate-reactive groups in said coating composition of at least about 200, preferably at least about 300, more preferably at least about 500, said B-side comprising a tertiary amine catalyst and optionally an isocyanate-reactive compound selected from the group consisting of monoahls, polyols, imines, oxazolidines, and combinations thereof, said coating composition optionally containing a solvent in an amount of less than about 45%, based upon the weight of the polyisocyanate in said coating composition, said coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds, said composition being essentially free of any volatile mono- and di-isocyan

Abstract: This invention relates to a process for coating a substrate which comprises contacting the substrate with a low volatility organic (so-called "low VOC") coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate prepolymer which is the reaction product of a polyisocyanate with an active hydrogen-containing compound selected from the group consisting of monoahls, polyols, imines, oxazolidines, and combinations thereof, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a tertiary amine catalyst, said composition being essentially free of any volatile mono- and di-isocyanates, and said composition being moisture curable upon exposure to atmospheric moisture. Also claimed is the coating composition itself.

Abstract: The polyurethane oligomer reaction product of a hydroxyl-terminated prepolymer with a dicarboxylic acid anhydride is incorporated into conventional thermosetting polyester resin formulations to impart improved impact properties and reduced shrinkage behavior.

Abstract: The present invention relates to a process for coating a substrate which comprises (a) contacting said substrate with a low volatility organic (so-called "low VOC") coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and an trimerization catalyst, said composition being essentially free of any volatile mono- and di-isocyanates, to form a coating on said substrate, and (b) heating said coating to a curing temperature of between 120.degree. F. and 350.degree. F. for a curing time of between about ten minutes and about six hours in order to cure said coating by trimerizing at least some of the isocyanate groups of the polyisocyanate to provide a heat-cured coating on said substrate. Also claimed is the coating composition itself.

Abstract: This invention relates to a process for coating a substrate which comprises contacting the substrate with a low volatility organic (so-called "low VOC") coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate prepolymer which is the reaction product of a polyisocyanate with an active hydrogen-containing compound selected from the group consisting of monoahls, polyols, imines, oxazolidines, and combinations thereof, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a tertiary amine catalyst, said composition being essentially free of any volatile mono- and di-isocyanates, and said composition being moisture curable upon exposure to atmospheric moisture. Also claimed is the coating composition itself.

Abstract: This invention relates to the production of spandex fibers made from segmented polyurethane(urea)s which are prepared from low unsaturation-containing polyols made by polymerizing alkylene oxides in the presence of a double metal cyanide complex catalyst. With the low unsaturation-containing polyols, spandex fibers can be prepared that have better physical properties than fibers prepared with PTMEG polyols.

Abstract: The present invention relates, in one aspect, to a process for preparing a storage-stable dispersion of a biocide which comprises the steps of: (a) mixing a plastisol, comprising a resin and a carrier, and a biocide to provide a mixture of said plastisol and said biocide (b) heating said mixture of plastisol and biocide to an elevated temperature of between about 30.degree. C. and about 100.degree. C. to provide a homogeneous, storage stable dispersion, said dispersion containing said biocide in an amount of between about one and about 30 weight percent based upon the weight of said dispersion, said resin being present in an amount of between about 5 and about 75 weight percent based upon the weight of said dispersion, with the proviso that when the weight percent of said resin in said dispersion is between about 30% and about 75%, then said elevated temperature is between 30.degree. C. and 45.degree. C.

Abstract: A radio (100) transmits and receives encrypted signals having unencrypted key identifiers, allowing other radios having the corresponding key identifiers and encryption keys to communicate with radio (100). Prior to transmitting an encrypted message, radio (100) selects a unique key identifier automatically and uses the corresponding encryption key to encrypt the message that will be transmitted. Radio (100) transmits the key identifier in an unencrypted format with the encrypted message in order to allow other radios to determine the encryption key used in encrypting the message. When receiving an encrypted message, radio (100) uses the predetermined process stored in the radio (100) to properly select the proper encryption key for use in decrypting the incoming message.

Abstract: A phosphor is placed on a light emitting surface of a solid state optical source. The phosphor absorbs the narrow bandwidth light from the optical source, and emits light that has a wide bandwidth. A lens is used to collect and focus the wide bandwidth light.

Abstract: A trunked communication system (400) transmits and receives encrypted signals over the system control channel (402). The trunked system (b 400) includes a plurality of radios (300) which can communicate with the communication system via control channel (402). By using control information signals and system information signals radios (300) can determine if it they are capable of decrypting the encrypted control information signals sent over the control channel (402). This is done by first determining if the encryption identification field found in the unencrypted system information signal matches an encryption identification field found in radio (300). If a match is found between the radio's encryption identification and the encryption identification field in the system identification signal radio (300) loads the encryption into the encryption circuitry in order to successfully decrypt the control information signals.

Abstract: This invention relates to a method of fabricating a thermoplastic elastomer which comprises the steps of: (a) fabricating a polyol having a molecular weight of between about 2,000 and about 8,000 and having a level of end group unsaturation of no greater than 0.02 milliequivalents per gram of polyol, said polyol being fabricated in the presence of a double metal cyanide catalyst, (b) reacting said polyol with a diisocyanate to produce an isocyanate-terminated prepolymer, and (c) reacting said isocyanate-terminated prepolymer with a difunctional isocyanato-reactive chain extender in a mold or in an extruder in order to produce an elastomer characterized by a hardness of between a Shore A hardness of about 50 and a Shore D hardness of about 65. Also claimed is the elastomer produced by the above method utilizing a one-shot technique.

Abstract: A method of voice communication is provided to avoid disruption in the received voice signal. A compressed voice signal is received occupying 100% of the audio time during a lesser percentage (352) of the radio frequency (RF) time (302). An informational signal is also received during at least a portion of a remainder (354) of the RF time. Scanning for another channel, receiving data or embedded control signals may occur during at least a portion of the remainder (354) of the RF time saved.

Abstract: A method for fabricating an all silicon absolute pressure sensor employing silicon-on-insulator structures. More particularly, a method for fabricating an all silicon absolute pressure sensor based upon an ungated metal-oxide semiconductor field-effect transistor which offers a high degree of immunity to temperature effects, increased reliability, minimal substrate parasitics, reduced manufacturing variations from device to device, as well as inexpensive and simple fabrication.

Abstract: This invention relates to a method of fabricating a thermoplastic elastomer which comprises the steps of: (a) fabricating a polyol having a molecular weight of between about 2,000 and about 20,000 and having a level of end group unsaturation of no greater than 0.04 milliequivalents per gram of polyol, said polyol being fabricated in the presence of a double metal cyanide catalyst, (b) reacting said polyol with a diisocyanate to produce an isocyanate-terminated prepolymer, and (c) reacting said isocyanate-terminated prepolymer with a difunctional isocyanato-reactive chain extender in a mold or in an extruder in order to produce a soft elastomer characterized by a Shore A hardness of between about 10 and about 70. Also claimed is the elastomer produced by the above method utilizing a one-shot technique.

Abstract: A heat transfer composition comprising a heat transfer medium and a lubricant, wherein said heat transfer medium is a low boiling organic compound and wherein said lubricant is a halogenated polyoxyalkylene monoalcohol having the empirical structural formula:R.sub.1 X.sub.m (OR.sub.2).sub.n --OHwherein R.sub.1 and R.sub.2 are independently selected from the group having 1 to 18 carbon atoms, an aryl group having from 6 to 18 carbon atoms, and combinations thereof, X is a halogen, m is an integer of between 1 and 37, and n is an integer from 5-350. Also claimed is the process for making the lubricant and the lubricant composition itself.

Abstract: A process for making metal salt (ionomers) of carboxylic acid-containing mono- and polyether polyol addition products by (1) reacting maleic acid, fumaric acid, itaconic acid, or mixtures thereof with at least one polyhydroxy-containing mono- or polyether compound (e.g. a polyether diol or triol) in the presence of a peroxy-type free radical initiator to form a carboxylic acid group-containing addition product and (2) neutralizing said addition product with a sufficient amount of metal ions selected from the group consisting of metals from Groups 1a, 2a, 8, 1b and 2b of the Periodic Table to convert at least about 10% of the carboxylic acid groups to ionomeric salt groups. These ionomers may be then changed into useful polyurethane elastomers by reaction with organic polyisocyanates.

Abstract: A microminiature valve having a multilayer integral structure formed on a semiconductor substrate. The valve comprises a semiconductor substrate having inlet and outlet apertures and a raised valve seat. The substrate is overlayed with a nonporous top layer and an intermediate layer. The central portion of the intermediate layer is preferentially etched away to form an enclosed chamber connecting said inlet and outlet ports. The unetched portion of said intermediate layer peripherally supports said top layer above the valve seat. An electrically conductive electrode disposed on the unsupported portion of the top layer permits it to be electrostatically deflected to engage the valve seat and close the valve.