Terrance D Williams

US Patent:

45253889, Jun 25, 1985

Filed:

Dec 23, 1983

Appl. No.:

6/565198

Inventors:

Thomas E. Rehder - Mundelein IL
Terrance L. Williams - Crystal Lake IL

Assignee:

USG Corporation - Chicago IL

International Classification:

B05D 302
B05D 304
B05D 700

US Classification:

427221

Abstract:

Expanded perlite is produced while simultaneously or substantially simultaneously coating the expanded perlite with an hydrophobic coating material by passing the expanded perlite and heated expander exhaust gases from the expansion chamber through a cooling and coating chamber provided with spray nozzles to provide a stream of atomized coating material onto the expanded perlite, while upstream thereof an air intake and temperature sensor are situated to control the air flow and temperature in the cooling and coating chamber so as to provide proper curing temperatures for the coating material upon the expanded perlite before it is separated from the exhaust gases.

US Patent:

46862536, Aug 11, 1987

Filed:

Feb 20, 1986

Appl. No.:

6/831973

Inventors:

Arthur W. Struss - Libertyville IL
Terrance L. Williams - Crystal Lake IL
Lawrence T. Eby - Arlington Heights IL

Assignee:

United States Gypsum Company - Chicago IL

International Classification:

C04B 1116

US Classification:

524 44

Abstract:

Expanded perlite coated with a composition to render the perlite impervious to water, and a joint compound incorporating the same. The perlite is ground prior to expansion to provide subsequently expanded perlite having a mean particle size from about from about 50 to about 70 microns, the joint compound formed from the perlite having greater uniformity in paint gloss appearance between the painted surface of the joint compound and the painted surface of the gypsum wallboard on which the joint compound is applied.

US Patent:

45871736, May 6, 1986

Filed:

Apr 26, 1984

Appl. No.:

6/603926

Inventors:

Geronimo E. Lat - Skokie IL
Terrance L. Williams - Crystal Lake IL

Assignee:

United States Gypsum Company - Chicago IL

International Classification:

C23F 1100

US Classification:

428457

Abstract:

Metal cornerbead for drywall partitions is coated with a water reducible acrylic resin to improve the adhesion of joint compound to it. Aqueous solution of resin may be added to roll-forming lubricant such as hexylene glycol.