Reinforced composites
CA 1085342 A · Owner: Ciba-Geigy Ag · Inventors: Green, George E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A method for the preparation of prepregs comprises i) exposing to actinic radiation a layer of a liquid composition containing an epoxide resin, a photopolymerisable compound and a heatactivated curing agent for epoxide resins until the said composition solidifies to form an essentially solid continuous film due to photopolymerisation of the said photopolymerisable compound while the epoxide resin remains substantially in the thermosettable state and, ii) bringing together the film so formed and fibrous reinforcing material under conditions such that the said film flows about the fibers and the components of the said film and the fibers form a coherent structure. …
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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 September 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 1997.
- 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.