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Laminated felted sheets and asbestos containing coating composition for use therein (US Patent 3,619,354, 1971)

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Robert G. Woolery received US Patent No. 3,619,354 on November 9, 1971, filed February 5, 1969.

The patent's abstract:

Disclosed is a process for forming laminated felted sheets wherein a wet base sheet of fibrous material is formed on a paper making screen and, before the wet base sheet is removed from the screen, a nonseparable, uniform asbestos-binder composition is applied thereto. The composition comprises an intimitate mixture containing (a) at least 50 percent by weight of chrysotile asbestos having a specific surface area from about 60-80 m2/g., a magnetite content of from about 0.04-0.5 percent, a reflectance of from about 72-78 percent, and a pulpability such that 0.2-1 percent of the asbestos is retained on a 65 mesh Tyler screen and (b) a binder therefore. The ratio of asbestos to binder, on a dry weight basis, ranges from about 3:1 to 9:1.

Author
Robert G. Woolery
Published by
US Patent Office
Series
US Patent No. 3,619,354
Date
November 9, 1971
Library no.
ACL Doc 22853 · asbestosclaims.law/library/22853
Rights
US government work, in the public domain.

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Cite this document

Robert G. Woolery. “Laminated felted sheets and asbestos containing coating composition for use therein (US Patent 3,619,354, 1971).” November 9, 1971. US Patent No. 3,619,354. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22853. https://asbestosclaims.law/library/22853.

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