41
Enoch I Wang, Lifun Lin, William L Bowden: Process for producing manganese dioxide. Duracell, Ronald S Cornell, James B McVeigh, Barry D Josephs, January 11, 1994: US05277890 (40 worldwide citation)

The invention relates to the manufacture of manganese dioxide by a chemical process. The resulting manganese dioxide product takes the form of particles characterized by filament-like protrusions jutting out from its surface. The manganese dioxide particles having such surface features can be manufa ...


42
James L Filson, Wesley R Carrera, Ramesh R Bhave: Ultra pure water filtration. Illinois Water Treatment, Douglas G Glantz, May 21, 1996: US05518624 (39 worldwide citation)

Ceramic filtration of a feed solution of ultra pure water and particle contaminants is disclosed through a metal oxide membrane on ceramic support. In one aspect, the filtering of ultra pure water from a feed solution containing ultra pure water and contaminant particles includes passing the feed so ...


43
Klas R Wiklund, Erik I Johansson: Method and apparatus for sampling measurement data from a chemical process. Pharos, Larson and Taylor, May 20, 1986: US04590466 (39 worldwide citation)

A method and an apparatus of obtaining measurement data from a chemical process in a mass in a space, such as the charge in a blast furnace, is disclosed where the mass passes through the space from an inlet to an outlet and chemical and/or mechanical change in the mass takes place as it passes thro ...


44
Tito Viswanathan, Donald H Westermann: Process for preparation of resin and resin obtained. Chemical Process Corporation, Quarles and Brady, September 8, 1987: US04692478 (39 worldwide citation)

The process of preparing a formaldehyde-free, thermosetting resin which is especially useful for bonding lignocellulosic materials together to form plywood or particle board, which process comprises first reacting an aqueous preparation containing a carbohydrate raw material with a mineral acid to c ...


45
Andrew S Zarchy: Chemical processing with an operational step sensitive to a feedstream component. UOP, Morris N Reinisch, May 16, 1989: US04831206 (39 worldwide citation)

The present invention relates to a chemical process involving a processing step which is sensitive to the presence of at least one component contained within the stream to be processed. In particular, the present invention relates to an economical and efficient method of integrating the means for re ...


46
Igor K Kotliar: Apparatus for hypoxic training and therapy. December 22, 1998: US05850833 (39 worldwide citation)

An apparatus is provided for hypoxic training or therapy. The apparatus provides a user air having a lower oxygen content than the ambient atmosphere. The apparatus reduces the oxygen content of the air by passing the ambient air through a membrane separator which extracts the oxygen therefrom by a ...


47
Tetsuo Koyanagi, Hiroshi Yamaguchi, Ichio Yokota, Naofumi Mitsumune, Koichi Tange: Treatment method of semiconductor wafers and the like and treatment system for the same. Ses, Darby & Darby, September 14, 1999: US05951779 (38 worldwide citation)

A treatment method of semiconductor wafers and the like, for carrying out step by step in a sealed container, a series of processes comprising chemical process with a cleaning chemical (chemical process) and final water rinsing process by using rinsing pure water (rinse process) and a drying process ...


48
Madhav Datta, Ravindra Shenoy: Electroetching process for seed layer removal in electrochemical fabrication of wafers. IBM Corporation, Ratner & Prestia, January 23, 1996: US05486282 (36 worldwide citation)

A tool and process for electroetching metal films or layers on a substrate employs a linear electrode and a linear jet of electrolyte squirted from the electrode. The electrode is slowly scanned over the film by a drive mechanism. The current is preferably intermittent. In one embodiment a single wa ...


49
Steven G Schon: Plastic film plate-type heat exchanger. Arco Chemical Company, Lewis J Young, May 17, 1988: US04744414 (36 worldwide citation)

This invention relates to low cost heat exchangers of the parallel plate-type useful for recovery or dissipation of heat energy in buildings of all types, including homes, office buildings and factories, as well as for heat recovery in the chemical process, electrical power and other industries.


50
John C Rankin: Dry chemical process for grafting acrylic and methyl acrylic ester and amide monomers onto starch-containing materials. The United States of America represented by the Secretary of Agriculture, M Howard Silverstein, David G McConnell, Curtis P Ribando, May 18, 1982: US04330443 (36 worldwide citation)

Acrylic monomers are grafted onto starch-containing materials by a novel dry state process in which small amounts of peroxides chemically initiate the free radical reaction. Since the process is dry and the resultant products contain no contaminants, it is unnecessary to isolate, wash, and dry them ...



Click the thumbnails below to visualize the patent trend.