Reinforced plastics materials
CA 1075578 A · Owner: Ciba-Geigy Ag · Inventors: Mitra, Panchanan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 3-10204/ARL 244+, CANADA, REINFORCED PLASTICS MATERIALS Abstract of the Disclosure, A method of preparing ribbons of unidirectional fiber-reinforced plastics material comprises-, 1) laying unidirectional fibers in a series of discrete parallel strips onto a plastics material, which may be in the form of strips each wider than the strips of fibers, but preferably as a continuous sheet, on a backing comprising a first continuous sheet of release material, 2) applying a second continuous sheet of release material to the fibers, 3) applying heat and pressure such that the plastics material flows about the fibers to form a series of coherent strips 4) removing only one of the layers of …
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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 April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 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.