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Pieter Alfons Hammenecker received US Patent No. 1,874,974 on August 30, 1932, filed November 26, 1930. It was assigned to Ruberoid Co.
The patent's description opens (from the scanned text):
The present invention relates to cold enameling of asbestos-cement facing plates and it has for an object a process permitting of obtaining an enamel of greater hardness and of greater resistance to atmospheric agents tlaan the enamels obtained by the usual metho s.
- Author
- Pieter Alfons Hammenecker
- Published by
- US Patent Office
- Series
- US Patent No. 1,874,974
- Date
- August 30, 1932
- Library no.
- ACL Doc 23418 · asbestosclaims.law/library/23418
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 2 pages · 251 KB
Where it was listed
- Asbestos, September 1932, in its patents department (the year's issues)
Cite this document
Pieter Alfons Hammenecker. “Process for Cold Enameling Asbestos Cement Plates (US Patent 1,874,974, 1932).” August 30, 1932. US Patent No. 1,874,974. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23418. https://asbestosclaims.law/library/23418.
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