William C Holt

US Patent:

39922120, Nov 16, 1976

Filed:

Sep 12, 1974

Appl. No.:

5/505405

Inventors:

Karl J. Youtsey - Chicago IL
William C. Holt - Prospect Heights IL
Robert D. Carnahan - Barrington IL

Assignee:

Universal Oil Products Company - Des Plaines IL

International Classification:

C09D 524
C09D 1108

US Classification:

106 1

Abstract:

Electrical resistor inks comprising a mixture of at least one semi-conducting pyropolymeric inorganic refractory oxide material and a vehicle consisting of a binder such as a synthetic resin or a varnish, and a suitable solvent or oil, etc. , are useful in forming resistors in electrical circuits, especially on printed circuit boards and on the ceramic substrates used for thick film circuits. In addition, the ink may contain other components such as metal powders, anti-skinning agents, drying agents, colored pigments, waxes, etc.

US Patent:

40189430, Apr 19, 1977

Filed:

Feb 14, 1972

Appl. No.:

5/226035

Inventors:

Karl J. Youtsey - Chicago IL
William C. Holt - Arlington Heights IL
Robert D. Carnahan - Barrington IL
David H. Spielberg - Schaumburg IL

Assignee:

Universal Oil Products Company - Des Plaines IL

International Classification:

H01L 2164

US Classification:

427 87

Abstract:

A method of making conductive material for a conducting device. The material is formed by reacting an organic pyrolyzable substance in the presence of a refractory oxide having a surface area of from about 1 to about 500 square meters per gram in a non-oxidizing atmosphere at a temperature of at least 400. degree. C.

US Patent:

39732347, Aug 3, 1976

Filed:

Oct 8, 1974

Appl. No.:

5/513026

Inventors:

Karl J. Youtsey - Chicago IL
William C. Holt - Prospect Heights IL
Robert D. Carnahan - Barrington IL
David H. Spielberg - Schaumburg IL

Assignee:

Universal Oil Products Company - Des Plaines IL

International Classification:

H01C 1012

US Classification:

338226

Abstract:

Improved forms of electric resistance elements or resistors may be made from semiconducting organic-refractory oxide fibers, as for example drawn alumina fibers which have been subjected to contact with a pyrolyzable organic substance at a temperature above about 400. degree. C. A few, or a large number of the semiconductive fibers, can be used in a group or bundle form to provide a desired resistance for a particular resistor. A preferred form of resistance element will cover the fibers in a quartz tube or other suitable encapsulating material to preclude moisture problems.

US Patent:

39405095, Feb 24, 1976

Filed:

Dec 19, 1973

Appl. No.:

5/426280

Inventors:

Karl J. Youtsey - Chicago IL
William C. Holt - Prospect Heights IL

Assignee:

Universal Oil Products Company - Des Plaines IL

International Classification:

H01L 324
B05D 512

US Classification:

427 82

Abstract:

Semi-conducting materials which may be used in preparing resistors may be prepared by treating a refractory oxide with a pyrolyzable organic compound at an elevated temperature and thereafter further treating the resultant semi-conducting pyropolymeric inorganic refractory oxide composite material at an elevated temperature with subsequently controlled cooling rate to provide a material which possesses a lower resistivity and a controllable temperature coefficient of resistance over a wide range.