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U.S. Patent No. 3,421,975, Reversible Flocculation and Redispersion of Chrysotile Asbestos (Woolery and Dresher, assignors to Union Carbide) (1969)

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U.S. Patent No. 3,421,975, filed April 30, 1965, and issued January 14, 1969, to Union Carbide Corporation as assignee. It describes a process for flocculating chrysotile asbestos dispersed in water by raising the pH to 6.0-10.5, filtering and drying it, and then redispersing the dry asbestos by lowering the pH with a monobasic acid. The specification names short-fibered chrysotile from deposits near Coalinga, California as the preferred type, gives three examples, and lists 11 claims.

Author
Robert G. Woolery (inventor; assignor to Union Carbide Corporation); William H. Dresher (inventor; assignor to Union Carbide Corporation)
Published by
United States Patent Office (patent assigned to Union Carbide Corporation)
Series
Union Carbide documents, UC-103
Date
January 14, 1969
Number
Bates A13617 to A13620
Library no.
ACL Doc 15379 · asbestosclaims.law/library/15379
Rights
A document from asbestos litigation, published for research and historical study.

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Read online Download the PDF Document UC-103 · 4 pages · 280 KB

People and organizations

From Robert G. Woolery (inventor; assignor to Union Carbide Corporation); William H. Dresher (inventor; assignor to Union Carbide Corporation).

Pages on our site about what this document covers: California Asbestos Exposure Sites: Worksites, Industries, and Trust Coverage · Chrysotile: White Asbestos, the Most Common Type · Coalinga District.

About this copy

This is document UC-103 of the Union Carbide documents, documents produced and used as evidence in asbestos lawsuits against Union Carbide, 4 pages. Production numbers A13617 to A13620.

Cite this document

Robert G. Woolery (inventor, assignor to Union Carbide Corporation), William H. Dresher (inventor, assignor to Union Carbide Corporation). “U.S. Patent No. 3,421,975, Reversible Flocculation and Redispersion of Chrysotile Asbestos (Woolery and Dresher, assignors to Union Carbide).” January 14, 1969. Union Carbide documents, UC-103, Bates A13617 to A13620. United States Patent Office (patent assigned to Union Carbide Corporation). AsbestosClaims.Law Library, ACL Doc 15379. https://asbestosclaims.law/library/15379.

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