51
Arthur H Hale, Ashok K R Dewan, George C Blytas: Gas hydrate inhibition. Shell Oil Company, December 31, 1991: US05076364 (90 worldwide citation)

Gas hydrate formation in a gas well is prevented by injecting a carrier and an alcohol (e.g., glycerol or a glycerol derivative) into the well and connected facilities/pipelines.


52
William H Stutz Jr: Apparatus and method for making electrical connections in an implantable pacemaker. Siemens Pacesetter, Lisa P Weinberg, Malcolm J Romano, December 31, 1991: US05076270 (90 worldwide citation)

A multi-part molded pacemaker connector that meets the precise requirements imposed by the VS-1 standard, yet does not require complex or expensive machining of individual parts. Advantageously, the pacemaker connector is made from a plurality of individually molded parts, with each individual part ...


53
Richard J Brown, Sidney Smith, David E Cerny, John T Foley: Centrifugation chamber having an interface detection surface. Baxter International, Paul C Flattery, Daniel D Ryan, Bradford R L Price, December 31, 1991: US05076911 (89 worldwide citation)

A system and method of separation of therapeutic components from blood. The system includes a dual member centrifuge and a disposable single use fluid transfer set. The set includes an elongated flexible separation chamber having an input port, a separated component output port and a residual fluid ...


54
Charles F Carey, Kenneth M Fallon, Rochelle Ginsburg, Charles G Woychik: Low temperature controlled collapse chip attach process. International Business Machines, Richard M Goldman, December 31, 1991: US05075965 (89 worldwide citation)

A controlled collapse chip connect method of joining an IC chip to a microelectronic circuit card. According to the method an inhomogeneous, anisotropic column of solder is deposited from a Pb/Sn alloy onto solder wettable I/O terminals of the I/C chip, without subsequent homogenizing reflow. The so ...


55
Gregory C Frye, Stephen J Martin: Dual output acoustic wave sensor for molecular identification. The United States of America represented by the United States Department of Energy, Karla Ojanen, James H Chafin, William R Moser, December 31, 1991: US05076094 (89 worldwide citation)

A method of identification and quantification of absorbed chemical species by measuring changes in both the velocity and the attenuation of an acoustic wave traveling through a thin film into which the chemical species is sorbed. The dual output response provides two independent sensor responses fro ...


56
John H Blanz: Cryogenic probe station having movable chuck accomodating variable thickness probe cards. John H Blanz Company, Weingarten Schurgin Gagnebin & Hayes, December 31, 1991: US05077523 (89 worldwide citation)

ATE is mounted directly to a support surrounding and removably receiving probe cards of differing thickness. An electrically heated chuck having a variable heat transfer coefficient heat exchanging face confronting a liquid nitrogen supplied plenum exhibits a temperature that varies with electrical ...


57
Richard K Elton: Flexible lubricious organic coatings. C R Bard, Wolf Greenfield & Sacks, December 31, 1991: US05077352 (88 worldwide citation)

A flexible, lubricious organic polymeric coating is formed by applying a mixture of an isocyanate, a polyol, poly(ethylene oxide), and carrier liquid to a surface to be coated. The carrier liquid is removed and the mixture reacted to form a polyurethane coating with associated poly(ethylene oxide) g ...


58
Barrie Gilbert: Variable-gain amplifier controlled by an analog signal and having a large dynamic range. Analog Devices, Parmelee Bollinger & Bramblett, December 31, 1991: US05077541 (87 worldwide citation)

A variable-gain amplifier including a ladder attenuator to which the input signal is applied. The ladder nodes develop progressively attenuated (reduced level) signals corresponding to the input signal. Controllable-transconductance (g.sub.m) stages are connected respectively to the ladder nodes, an ...


59
Masayuki Kato, Takashi Shinzaki, Seigo Igaki, Fumio Yamagishi, Hiroyuki Ikeda: Biological detecting system and fingerprint collating system employing same. Fujitsu, Staas & Halsey, December 31, 1991: US05077803 (87 worldwide citation)

A biological detecting system comprising a light source; a condensing optical system for condensing a light beam from the light source and irradiating the surface of a sample to be detected with a spot of light, an imaging optical system for condensing light reflected or scattered by an irradiated p ...


60
John L Rourke, Peter D Wing, Jack F Ratcliffe II, Paul J Valliere: Security system for electronic printing systems. Xerox Corporation, Fredrick E McMullen, December 31, 1991: US05077795 (86 worldwide citation)

An electronic printing system with a security system for protecting the security of a user's files and programs through the intermediary of a user profile for each user administered to by a Security administrator at the site or from a remote site.