Finished metal sheet with removable protective covering and method of making same
CA 1052681 A · Owner: Revere Copper And Brass Incorporated · Inventors: Vecchiarelli, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The finished surface of a metal sheet is protected with a removable film of thermoplastic material bonded to the finished surface along a grid-like pattern of lines that form hermetic seals for a plurality of discrete gas pockets between the finished metal surface and the film. The product is formed by preheating the metal to bonding temperature, by then bringing a discrete film of thermoplastic material into contact with the finished surface, and by pressing the film against the heated metal surface with a resilient pattern of ridges to form the aforesaid pattern of seal lines.
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 April 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 1996.
- 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.