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Richard Leon Fricklas received US Patent No. 3,694,306 on September 26, 1972, filed March 4, 1971.
The patent's abstract:
A LAYER OF ASPHALT IMPREGNATED ASBESTOS FELT IS ADHERED TO A METAL ROOF DECK BY NONCUMBUSTIBLE ADHESIVE AND A LAYER OF NONCOMBUSTIBLE INSULATING BOARDS IS ADHERED TO THE ASBESTOS FELT BY MOPPING ASPHALT. A CONVENTIONAL BUILT-UP ROOF CAN BE INSTALLED OVER THE INSULATING BOARDS.
- Author
- Richard Leon Fricklas
- Published by
- US Patent Office
- Series
- US Patent No. 3,694,306
- Date
- September 26, 1972
- Library no.
- ACL Doc 22316 · asbestosclaims.law/library/22316
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 5 pages · 552 KB
Where it was listed
- Asbestos, March 1973, in its patents department (the year's issues)
Cite this document
Richard Leon Fricklas. “Fire-resistant asbestos vapor barrier system (US Patent 3,694,306, 1972).” September 26, 1972. US Patent No. 3,694,306. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22316. https://asbestosclaims.law/library/22316.
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