Easily feedable envelope construction
CA 1284136 C · Owner: Uarco Incorporated · Inventors: Schnitzer, David H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An envelope construction including a pair of superimposed sheets 10, 12 having aligned opposed side edges 14, 16, a third edge 18 of one of the sheets 10 extending between the side edges 14, 16 being enlarged in comparison to the third edge 20 of the other sheet 12 and carrying an adhesive 24 to define a sealable flap 22 for the envelope. A U-shaped glue pattern 28 secures the sheets 10 and 12 together and the bight 32 of the U-shaped pattern is spaced from the third edges 18 and 20 as well as from a fourth edge 34 to define an envelope pocket as well a an envelope extension 36 between the bight 32 and the fourth edge 34. The extension 36 aids in the prevention of hang-up when the envelope …
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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
- 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.