Expired Canadian patentCanada
Polarization of a multi-ply stack of piezoelectric- forming resin pellicles
CA 1106982 A · Owner: Atochem North America, Inc. · Inventors: Sprout, Oliver S. Jr.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-ply stack of individual pellicles of a piezoelectric-forming resin is subjected to a polarizing amount of voltage applied between two electrodes and to elevated temperature.
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 August 11, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 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.
FiledAugust 4, 1977
GrantedAugust 11, 1981
Term endedAugust 11, 1998
Patent numberCA 1106982 A
Classification (IPC)H01L41/25 +2 more
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.