Method of reusing a web of computer paper
CA 1231002 A · Owner: Paper, Inc. · Inventors: Booth, Barclay; Clar, Milton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method of and apparatus for rendering subject matter which is printed on one surface of a paper sheet (11a) unintelligible, an alpha-numeric interference pattern (Fig. 7) is printed over substantially the entire printing area of the surface of the sheet (11a) carrying the printed subject matter the, density of the interference pattern (Fig. 7) being sufficient to render the printed subject matter unintelligible. One particular use of the method is in the overprinting of computer print-out paper having printed information on one surface, so that the paper may be reused by printing on its opposite surface without permitting access to the information on the firstprinted surface. A machine …
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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 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 5, 2005.
- 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.