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John W. Swope received US Patent No. 2,210,348 on August 6, 1940, filed April 18, 1939.
The patent's description opens (from the scanned text):
The present invention relates to improvements in roofing materials of the type generally known as composition roofings and aims generally to improve existing materials of that type. 5 One of the principal objects of the invention is the provision of an improved roofing having a woven textile center or base, such as heavy cotton duck, which is coated and impregnated with an asphalt composition of a character providing a permanent flexible body that will not chemically attack or disintegrate the fabric center.
- Author
- John W. Swope
- Published by
- US Patent Office
- Series
- US Patent No. 2,210,348
- Date
- August 6, 1940
- Library no.
- ACL Doc 23590 · asbestosclaims.law/library/23590
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 179 KB
Where it was listed
- Asbestos, September 1940, in its patents department (the year's issues)
Cite this document
John W. Swope. “Roofing Material (US Patent 2,210,348, 1940).” August 6, 1940. US Patent No. 2,210,348. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23590. https://asbestosclaims.law/library/23590.
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