David A Schulz

US Patent:

40326071, Jun 28, 1977

Filed:

Sep 27, 1974

Appl. No.:

5/510128

Inventors:

David Arthur Schulz - Fairview Park OH

Assignee:

Union Carbide Corporation - New York NY

International Classification:

B29C 600
B29C 2500
D01F 912

US Classification:

264 293

Abstract:

Self-bonded webs of non-woven carbon fibers in the form of blankets, felt, paper, fiberboard, and the like, are produced by spinning a carbonaceous pitch having a mesophase content of from about 40 percent by weight to about 90 percent by weight to form carbonaceous pitch fiber; disposing staple lengths of the spun fiber in intimately contacting relationship with each other in a non-woven fibrous web; heating the web produced in this manner in an oxidizing atmosphere to thermoset the surfaces of the fibers to an extent which will allow the fibers to maintain their shape upon heating to more elevated temperatures but insufficient to thermoset the interior portions of the fibers; heating the web containing the externally thermoset fibers under compressive pressure in an oxygen-free atmosphere to a temperature sufficiently elevated to cause the mesophase pitch in the unoxidized interior portions of the fibers to undergo liquid flow and exude through surface pores or flaws in the fibers and contact the surfaces of the adjacent fibers; and further heating the web to a carbonizing temperature in an oxygen-free atmosphere so as to expel hydrogen and other volatiles and produce a carbon body wherein the fibers are bonded to each other by infusible carbon bonds.

US Patent:

49754130, Dec 4, 1990

Filed:

Aug 12, 1987

Appl. No.:

7/084614

Inventors:

Larry C. Satek - Wheaton IL
William F. Bennett - Hartsdale NY
David A. Schulz - Fairview Park OH

Assignee:

Amoco Corporation - Chicago IL

International Classification:

B32B 300

US Classification:

505 1

Abstract:

Superconducting composites are made from ceramic-type superconductors coated onto a low resistivity carbon fiber selected from those high strength fibers which have an ultrahigh modulus and high thermal conductivity. Flexible conductors of several different structures made from such composites are described as well as other useful forms of the composites.

US Patent:

43518168, Sep 28, 1982

Filed:

Dec 17, 1980

Appl. No.:

6/217438

Inventors:

David A. Schulz - Fairview Park OH

Assignee:

Union Carbide Corporation - Danbury CT

International Classification:

D01F 912

US Classification:

4234474

Abstract:

A method for producing a mesophase pitch derived carbon yarn features collecting thermoset mesophase pitch yarn onto a bobbin, and subjecting the thermoset yarn to a heat treatment in an inert atmosphere to pyrolyze and carbonize the thermoset yarn.

US Patent:

41385250, Feb 6, 1979

Filed:

May 4, 1977

Appl. No.:

5/793512

Inventors:

David A. Schulz - Fairview Park OH

Assignee:

Union Carbide Corporation - New York NY

International Classification:

B32B 900
B29C 2500
D02G 300

US Classification:

428367

Abstract:

Fibers having a high degree of flexibility and handleability are produced by oxidizing fibers spun from a carbonaceous pitch which has been transformed, in part, to a liquid crystal or so-called "mesophase" state to an oxygen content of from 17 per cent by weight to 30 per cent by weight. Because of their strength and handleability, these highly-oxidized fibers can be easily processed at high speeds by means of conventional yarn-transport systems, and readily woven or knit into cloth. Such cloth may then be heat treated to produce carbon or graphite cloth.

US Patent:

46860967, Aug 11, 1987

Filed:

Jul 20, 1984

Appl. No.:

6/632839

Inventors:

David A. Schulz - Fairview Park OH
Loren C. Nelson - Strongsville OH

Assignee:

Amoco Corporation - Chicago IL

International Classification:

D01F 912

US Classification:

4234471

Abstract:

Chopped carbon yarn is produced by spinning continuous pitch yarn, treating the pitch yarn with an oxidizing composition, chopping the pitch yarn into short lengths, collecting the chopped pitch yarn into a bulk form, and subjecting the chopped pitch yarn to a heat treatment in a substantially non-reactive atmosphere to produce chopped carbon yarn.

US Patent:

52662942, Nov 30, 1993

Filed:

Jan 15, 1992

Appl. No.:

7/821463

Inventors:

David A. Schulz - Fairview Park OH
Loren C. Nelson - Strongsville OH

Assignee:

Amoco Corporation - Chicago IL

International Classification:

D01F 912

US Classification:

4234471

Abstract:

High modulus, pitch-based, continuous carbon fiber having a density above about 2. 18 g/cc and an electrical resistivity below about 1. 6 micro-ohm-meter, and a method for making.

US Patent:

43711294, Feb 1, 1983

Filed:

Dec 17, 1980

Appl. No.:

6/217439

Inventors:

David A. Schulz - Fairview Park OH

Assignee:

Union Carbide Corporation - Danbury CT

International Classification:

B65H 7512
B65H 7514

US Classification:

2421187

Abstract:

A bobbin capable of retaining thermoset yarn during a heat treatment to pyrolyze and carbonize the thermoset yarn to produce a good quality carbon yarn, comprises a cylindrical body made of selected materials; and a layer of carbon felt positioned on the outside surface of the cylindrical body to receive the thermoset yarn and to minimize stress between the cylindrical body and the thermoset yarn during the heat treatment.

US Patent:

40147258, Mar 29, 1977

Filed:

Mar 27, 1975

Appl. No.:

5/562777

Inventors:

David Arthur Schulz - Fairview Park OH

Assignee:

Union Carbide Corporation - New York NY

International Classification:

D03D 2500
D01F 912
B32B 306

US Classification:

156148

Abstract:

Fibers having a high degree of flexibility and handleability are produced by oxidizing fibers spun from a carbonaceous pitch which has been transformed, in part, to a liquid crystal or so-called "mesophase" state to an oxygen content of from 17 per cent by weight to 30 per cent by weight. Because of their strength and handleability, these highly-oxidized fibers can be easily processed at high speeds by means of conventional yarn-transport systems, and readily woven or knit into cloth. Such cloth may then be heat treated to produce carbon or graphite cloth.