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Henry W. Johns of New York received this patent, No. 76,773, on April 14, 1868, for mixing asbestos with coal tar, asphalt, oils, pigments and similar materials. The specification gives recipes for asbestos roofing cement, fireproof paint, plastic compounds for sealing steam-pipe and other pipe joints, and asbestos combined with vulcanized rubber for piston packing and valves.
- Author
- Henry W. Johns
- Published by
- US Patent Office
- Series
- US Patent No. 76,773
- Date
- 1868
- Library no.
- ACL Doc 13208 · asbestosclaims.law/library/13208
- Rights
- US government work, in the public domain.
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Henry W. Johns. “Improved Compound for Roofing and Other Purposes.” 1868. US Patent No. 76,773. US Patent Office. AsbestosClaims.Law Library, ACL Doc 13208. https://asbestosclaims.law/library/13208.
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