Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Stratified or layered articles
Reexamination Certificate
2007-07-10
2007-07-10
Lee, Edmund H. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
Stratified or layered articles
C264S255000, C264S257000
Reexamination Certificate
active
10772975
ABSTRACT:
The invention relates to a process for making a product of artificial rock and a product thus made for use, in particular, in aquariums, tanks, swimming pools and the like; the process comprises the following operating steps: carrying out a first deposition of a mixture of powdered aggregates, resin, additives, within a cast or mould; catalyzing the mixture of said first deposition; covering the surface thus obtained with isophtalic or bisphenolic polyester resin; carrying out a second deposition of powdered aggregates, resin, additives; covering the surface derived from the second deposition with a layer of structural component and with resin; polymerizing the intermediate product thus obtained covering the surface thus obtained with a layer of gel; polymerizing the product thus obtained; removing the product from the mould; subjecting the product to a heating treatment.
REFERENCES:
patent: 3055148 (1962-09-01), Christy
patent: 3836619 (1974-09-01), Volent
patent: 5443774 (1995-08-01), Kluh et al.
patent: 08229906 (1996-09-01), None
patent: 11235899 (1999-08-01), None
Lee Edmund H.
McGlew and Tuttle P.C
Opera Laboratori Fiorentini S.p.A.
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