Schlatzer Jr Robert K: Unsaturated carboxylic acid-long chain alkyl ester copolymers and tri-polymers water thickening agents and emulsifiers. The B F Goodrich Company, October 28, 1975: US3915921 (227 worldwide citation)

Copolymers of a carboxylic acid monomer and one or more higher, that is 10 to 30 carbon atoms, alkyl acrylate esters surprisingly serve as efficient thickeners of aqueous solutions, even in the presence of substantial amounts of inorganic salts such as sodium chloride.

Shermeta Dennis William: Gastrostomy tube. Mon Donald D, October 28, 1975: US3915171 (226 worldwide citation)

A gastrostomy tube for insertion into the stomach and for retention as a consequence of bearing engagement against the inside stomach wall and the outside abdominal wall. A conduit carries a stiffly flexible retention bulb which can be collapsed by a stylet for insertion through a stab wound through ...

Hines Marion E: Image scrambling technique. Rosen Alfred H, Steinhilper Frank A, October 28, 1975: US3914877 (173 worldwide citation)

An unreadable scrambled image is prepared from an original image of a signature or other written matter, by a special photographic procedure involving the use of a code plate which contains a complex but unique and reproducible pattern of light and dark marks representing a numerical binary code by ...

Collins Brian Stuart: Coaxial connectors. C & S Antennas, Woodward William R, October 28, 1975: US3915539 (164 worldwide citation)

In a coaxial connector, the outer shell and back nut are injection mouldings of synthetic, non-conductive material. A metal sleeve in the shell provides electrical continuity for the outer conductor. The end of the sleeve projects slightly to abut and make connection to the outer conductor of a seco ...

Hatch Robert A, Johnson James R: Intumescent sheet material. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, October 28, 1975: US3916057 (161 worldwide citation)

An intumescent sheet material is provided containing vermiculite or other expandable mica. A process for mounting catalyst supports is described.

Opittek Eugene W, Hoffman William C, Ernstoff Michael N, Winner Richard N, Close Donald H: Holographic lens and liquid crystal image source for head-up display. Hughes Aircraft Company, MacAllister W H, Gerry Martin E, October 28, 1975: US3915548 (145 worldwide citation)

A head-up display system is disclosed for use in aircraft to display symbols and sensor video. The system uses an array of holographic elements on a transparent plate, or on the inside of the aircraft canopy, as both a collimating lens and a combiner for a light image from a liquid crystal source. A ...

Kraus Werner: Apparatus for promoting healing processes. Spencer & Kaye, October 28, 1975: US3915151 (138 worldwide citation)

An apparatus for promoting healing of body tissue composed of a coil arranged to be applied to the affected body part and to be connected to a low frequency a.c. source to produce a magnetic field within the region to be treated, and at least two sheet-like electrodes associated with the coil and sp ...

Brown deceased Cicero C: Break out elevators for rotary drive assemblies. Torres & Berryhill, October 28, 1975: US3915244 (131 worldwide citation)

Disclosed is a rotary drive assembly for manipulating well pipe. The assembly, which is carried in a drilling derrick, provides means for both threaded and non-threaded connection with a well pipe. The threaded connection is used for imparting rotary motion to the pipe and an attached drill string d ...

Kirk Jr Donald, Paolini Michael J: Electronic communications system for supplementary video program distribution. Columbia Pictures, Kenyon & Kenyon Reilly Carr & Chapin, October 28, 1975: US3916091 (105 worldwide citation)

A one-way cable communications system - as for a lodging facility, distributes commercial and supplementary video programing from common equipment to spaced subscriber stations located, for example, in each hotel-motel room. Heterodyne converter apparatus is included at each station for viewing the ...

Al Rene J, Smith Gerald B: Corrosion resistant pipe joint. Dresser, Rubin Daniel, October 28, 1975: US3915478 (101 worldwide citation)

Pipe joint components such as the metallic sleeve and companion nut of a compression-type pipe coupling are entirely coated with a corrosion resistant polymeric plastic. On each of the sleeve and nut, the coating terminates in a thread formation of coating composition tandemly juxtaposed and compris ...