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Benjamin F. Wallace received US Patent No. 1,678,659 on July 31, 1928, filed June 7, 1924.
The patent's description opens (from the scanned text):
This invention relates to improvements in the waterproofing of porous heat insulating materials of a fibrous nature, such for-example as magnesia pipe covering, and has for its principal objects the effective and homogeneous impregnation of the insulating material treated with a relatively small quantity of a highly penetrative and relatively permanent waterproof agent without deleteriously affecting the heat insulating property of the absorbent insulating material treated.
- Author
- Benjamin F. Wallace
- Published by
- US Patent Office
- Series
- US Patent No. 1,678,659
- Date
- July 31, 1928
- Library no.
- ACL Doc 23850 · asbestosclaims.law/library/23850
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 2 pages · 205 KB
Where it was listed
- Asbestos, December 1928, in its patents department (the year's issues)
Cite this document
Benjamin F. Wallace. “Waterproof Heat Insulation (US Patent 1,678,659, 1928).” July 31, 1928. US Patent No. 1,678,659. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23850. https://asbestosclaims.law/library/23850.
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