Process for obtaining reinforced cellular materials based on unsaturated polyester resins
CA 1159617 A · Owner: Snia Viscosa Societa Nazionale Industria Applicazioni Viscosa S.P.A. · Inventors: Cipriani, Aldo; Mazzola, Massimo; Carignani, Giancarlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for obtaining cellular materials from unsaturated polyester resins, reinforced with fillers having a density below 0.7 kg/l by injecting into a closed mould a liquid foam of, the resins having a density lower than that of the final cellular material, made by mechanical introduction of a gas, characterized by the fact that a liquid foam made from unsaturated polyester resins including conventional additives, is injected and subsequently cross-linked in a closed mould containing a reinforcing agent of synthetic artificial, vegetable or mineral fibres in the form of a monofilament mat, a cut fibre mat, a mono or bi-directional roving woven mat, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.