
US Patent No: 4,184,906
Number of patents in Portfolio can not be more than 2000
Method of making asbestos-cement laminates
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Jan 22, 1980
Issued date -
Apr 28, 1978
filing date -
05/901,364
serial no -
Expired
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Abstract
Laminated slabs superficially bonded together are prepared by autoclaving a vertically compressed stack including a plurality of the sheets when initially set but not finally cured and having a polyethylene or like plastic film-like layer sandwiched between each pair of the sheet surfaces to be bonded together. A layer of material other than asbestos-cement may be sandwiched between the asbestos-cement sheets, for example, metal foil, to make the slab moisture-impervious or an array of filaments or wire-mesh material as reinforcement may be used.
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