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Charles Emile Zwickert received US Patent No. 3,560,323 on February 2, 1971, filed December 9, 1966.
The patent's abstract:
A PREFABRICATED PANEL HAVING FIREPROOF CHARACTERISTICS, SAID PANEL HAVING INTERNAL CAVITIES FILLED WITH A PULVERULENT MIXTURE COMPRISING A SMALL PROPORTION OF BORAX WHICH AGGLUTINATES THE MIXTURE UPON HEATING, THUS PREVENTING THE FLOWING OF THE MIXTURE OUTSIDE THE CAVITIES WHEN THE PANEL IS PERFORATED UP TO THE CAVITIES UNDER ACTION OF A FLAME. PREFERABLY, LESS THAN 60 GRAMS OF FINELY POWDERED BORAX PER LITER OF MIXTURE IS THOROUGHLY DISPERSED IN THE REMAINDER OF THE MIXTURE, WHICH IS USUALLY A GRANULAR SOUND INSULATING AGENT SUCH AS SAND, ASBESTOS, REFRACTORY EARTH, CEMENT, ETC. IF DESIRED, THE MIXTURE MAY BE PARTIALLY PRE-AGGLUTINATED BY MODERATE HEATING. IN ADDITION, A SMALL PROPORTION OF BORAX MAY BE ADDED TO ANY ADHESIVES USED IN MAKING THE PANEL.
- Author
- Charles Emile Zwickert
- Published by
- US Patent Office
- Series
- US Patent No. 3,560,323
- Date
- February 2, 1971
- Library no.
- ACL Doc 22315 · asbestosclaims.law/library/22315
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 4 pages · 329 KB
Where it was listed
- Asbestos, April 1971, in its patents department (the year's issues)
Cite this document
Charles Emile Zwickert. “Fire-proofing of elements provided with cavities containing a powdered infill material (US Patent 3,560,323, 1971).” February 2, 1971. US Patent No. 3,560,323. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22315. https://asbestosclaims.law/library/22315.
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