Method of making image projection screen
CA 1108450 A · Owner: Microvue Products Inc. · Inventors: Hall, Peter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Image reflecting screens suitable for use in microfiche readers and the like are produced by a method which substantially reduces the cost of production by eliminating the need to plate the reflecting surface of the screen. The method of the present invention includes the steps of laminating a sheet of light reflecting foil to a sheet of fibrous material such as paperboard placing the, laminated sheet in a mould for forming a parabolic screen with the reflective foil abutting the wall of the mould that forms the parabolic surface of the screen and injecting the mould with a flowable plastics material and setting the plastics material whereby to form a screen and fuse the plastics material …
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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 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 1998.
- 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.