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Robert M. Stafford received US Patent No. 2,542,721 on February 20, 1951, filed January 25, 1947. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
This invention relates to a protective coating composition, and more particularly to a coating having waterproofing and fire-retardant properties adapting it for use on weather exposed structural surfaces such as building roofs.
- Author
- Robert M. Stafford
- Published by
- US Patent Office
- Series
- US Patent No. 2,542,721
- Date
- February 20, 1951
- Library no.
- ACL Doc 22313 · asbestosclaims.law/library/22313
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 339 KB
Where it was listed
- Asbestos, May 1951, in its patents department (the year's issues)
Cite this document
Robert M. Stafford. “Fire retardant waterproof coating (US Patent 2,542,721, 1951).” February 20, 1951. US Patent No. 2,542,721. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22313. https://asbestosclaims.law/library/22313.
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