Norman A Meinhardt, Kirk E Davis: Novel carboxylic acid acylating agents, derivatives thereof, concentrate and lubricant compositions containing the same, and processes for their preparation. The Lubrizol Corporation, Daniel N Hall, William H Pittman, Raymond F Keller, November 18, 1980: US04234435 (658 worldwide citation)

Carboxylic acid acylating agents are derived from polyalkenes such as polybutenes, and a dibasic, carboxylic reactant such as maleic or fumaric acid or certain derivatives thereof. These acylating agents are characterized in that the polyalkenes from which they are derived have a Mn value of about 1 ...

Peter M Lock, David R Webb: Wound dressing materials. Burns Doane Swecker & Mathis, November 18, 1980: US04233969 (508 worldwide citation)

A wound dressing material, particularly for burns, comprises a sheet of synthetic plastics material which is permeable to water vapor and air, preferably a polyurethane produced by polymerization of an isocyanate capped polyoxyethylene polyol, without any substantial amount of water present, using a ...

Robert J Akins: Prosthetic device couplings. CarboMedics, Fitch Even Tabin Flannery & Welsh, November 18, 1980: US04233690 (246 worldwide citation)

A prosthetic element is securely joined to a natural element of the human body using a ductile metal alloy coupling member which has a transition-temperature range and which has been deformed from its original shape at a temperature below its transition-temperature. Heating the coupling member to a ...

Maurice Daniel: Light emitting fabric. Sixbey Friedman & Leedom, November 18, 1980: US04234907 (237 worldwide citation)

A light emitting fabric (10) in which optical fibers (12, 28, 46, 48) are part of the weave, replacing some of the threaded fibers (27), whereby the fabric is uniformly illuminated and, accordingly, decorated. The individual optical fibers are gathered into a bundle (15) at one end of the fabric and ...

Jacob Riseman: Method for forming an insulator between layers of conductive material. International Business Machines Corporation, George O Saile, November 18, 1980: US04234362 (230 worldwide citation)

A method for forming an insulator between conductive layers, such as highly doped polycrystalline silicon, that involves first forming a conductive layer of, for example, polycrystalline silicon on a silicon body having substantially horizontal and substantially vertical surfaces. A conformal insula ...

Sylvester W Bies: Retractable blade knife. The Stanley Works, Prutzman Kalb Chilton & Alix, November 18, 1980: US04233734 (185 worldwide citation)

A retractable blade knife of the type having an elongate tubular handle and an elongate flat thin blade mounted for longitudinal sliding movement in the handle, is provided with a combination slide and latching member for positioning the blade which includes a slide mounted for sliding movement on t ...

Eugene J Van Scott, Ruey J Yu: Treatment of skin keratoses with .alpha.-hydroxy acids and related compounds. Leblanc Nolan Shur & Nies, November 18, 1980: US04234599 (166 worldwide citation)

Preventive as well as therapeutic treatment to alleviate the symptoms of skin keratoses consisting of topical application of a solution, gel, lotion, cream or ointment containing one or more of the .alpha.- or .beta.-hydroxy acids or .alpha.-keto acids, esters thereof, and their amine salts is discl ...

Melvin E Clutter: Electrical insulator and conductor cover. Chance Company, Schmidt Johnson Hovey & Williams, November 18, 1980: US04234753 (158 worldwide citation)

An improved electrical conductor cover is provided which essentially completely surrounds an energized conductor and is resistant to inadvertent, impact-induced dislocation of the cover during use. The cover includes an elongated, tubular, conductor-receiving section and a pair of ribbed, normally b ...

Arthur H DuRose: Two-step preplate system for polymeric surfaces. The Harshaw Chemical Company, James A Lucas, November 18, 1980: US04234628 (156 worldwide citation)

Non-metallic surfaces are prepared to receive an electroless metal deposit of copper, gold or nickel using a two-step adsorption procedure to sensitize the surface. The surface is first immersed in a bath containing copper in solution or suspension to adsorb the copper on the surface, followed by co ...

John M Tinsley, Larry T Watters: Lightweight cement and method of cementing therewith. Halliburton Company, John H Tregoning, Robert S Nisbett, William R Laney, November 18, 1980: US04234344 (146 worldwide citation)

A low-density, high-strength cement composition useful in a high temperature environment, such as in thermal wells, which includes hydraulic cement, a siliceous material and a relatively low-density inorganic material.