Sealed documents and methods of making and using same
CA 1310305 C · Owner: Greig, Walter G. · Inventors: Greig, Walter G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sealed documents are provided by placing an area or areas of reusable adhesive on one side of a sheet of paper or the like, and twice folding the document to seal same along one edge, or thrice folding the document along all edges. Multiple plied sheets may be manipulated in like manner.
Read the whole patent
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 November 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 2009.
- 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.