Robert W Lindstrom

US Patent:

42486823, Feb 3, 1981

Filed:

Sep 27, 1979

Appl. No.:

6/079469

Inventors:

Robert Lindstrom - Gloucester MA
Robert J. Allen - Saugus MA
Walter Juda - Lexington MA

Assignee:

Prototech Company - Newton MA

International Classification:

C25C 114

US Classification:

204114

Abstract:

This disclosure is concerned with improved thin gas diffusion electrodes comprising open pore carbon cloth substrates provided with a uniform mixture of catalytic carbon particles and preferably Teflon particles adhered within the cloth pores and to the yarns of the cloth, formed into an electrode assembly with a plurality of closely spaced preferably noble metal current collecting contacts throughout the area of the cloth and connected to external terminals for use in electrochemical cells, including metal-air batteries and zinc electro-winning cells and the like, operating at high current densities.

US Patent:

44229119, Dec 27, 1983

Filed:

Jun 14, 1982

Appl. No.:

6/387963

Inventors:

Walter Juda - Lexington MA
Robert J. Allen - Saugus MA
Robert Lindstrom - Gloucester MA
Amiran Bar-Ilan - Newtonville MA

Assignee:

Prototech Company - Newton MA

International Classification:

C25C 112
C25C 700

US Classification:

204106

Abstract:

This disclosure relates primarily to the recovery of hydrogen-reduced metals from aqueous solutions of salts thereof, such as, for example, copper from copper sulphate solution, by hydrogen reduction at a catalytic barrier made pervious to the solution, in an apparatus provided with means to supply hydrogen along a face of said barrier at which the aqueous solution is applied to effect deposition thereupon and flowing the solution transversely through the barrier to continue deposition upon the other face of the barrier.

US Patent:

42933960, Oct 6, 1981

Filed:

Sep 27, 1979

Appl. No.:

6/079470

Inventors:

Robert J. Allen - Saugus MA
Robert Lindstrom - Gloucester MA
Walter Juda - Lexington MA

Assignee:

Prototech Company - Newton Highlands MA

International Classification:

C25C 112

US Classification:

204106

Abstract:

This disclosure is concerned with thin gas diffusion electrodes comprising an open pore carbon cloth substrate provided with a uniform mixture of catalytic carbon particles and preferably Teflon particles adhered within the cloth poes and to the yarns of the cloth; processes for making and using the same; and assemblies comprising said electrodes and closely spaced preferably noble metal current collecting contacts for use in electrochemical cells operating at high current densities.

US Patent:

46473599, Mar 3, 1987

Filed:

Oct 16, 1985

Appl. No.:

6/787920

Inventors:

Robert W. Lindstrom - Reading MA

Assignee:

Prototech Company - Newton Highlands MA

International Classification:

C25B 1112
B32B 3112
H01M 486

US Classification:

204294

Abstract:

An improved electrocatalytic gas diffusion electrode comprising an open pore carbon cloth carrying on one side a first uniform mixture of noble-metal-catalyzed carbon and a hydrophobic binder adhered within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth, and a second uniform mixture of non-catalytic carbon and a hydrophobic binder adhered to the remaining open pore portion on the other side of said cloth; and method of preparation.

US Patent:

43315208, May 25, 1982

Filed:

Oct 26, 1979

Appl. No.:

6/088373

Inventors:

Walter Juda - Lexington MA
Robert J. Allen - Saugus MA
Robert Lindstrom - Gloucester MA

Assignee:

Prototech Company - Newton MA

International Classification:

C25C 110
C25C 120
C22B 1512
H01M 492

US Classification:

204105R

Abstract:

This disclosure concerns primarily the recovery of hydrogen-reduced metals from aqueous solutions of salts thereof, by hydrogen reduction at a porous hydrophobic catalytic barrier, at ordinary temperatures, in an apparatus provided with means to supply hydrogen to one face and aqueous solution to the other face of said barrier.

US Patent:

45240949, Jun 18, 1985

Filed:

Apr 19, 1984

Appl. No.:

6/602011

Inventors:

Robert Lindstrom - Reading MA
Robert J. Allen - Saugus MA

Assignee:

Prototech Company - Newton Highlands MA

International Classification:

F16L 1308
B32B 516
D04C 100

US Classification:

428 36

Abstract:

This disclosure is concerned with a novel multiple quartz fiber or similar yarn braided, supportable cylindrical sleeve carrying catalytic coatings for effective flameless catalytic combustion of an air-gas mixture axially fed to the cylinder.