Expired Canadian patentCanada
Method and apparatus for measuring low density atmospheres
CA 692007 A · Owner: Schumacher, Wilhelm W. B. · Inventors: Schumacher, Wilhelm W. B.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 4, 1964. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 1981.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 30, 1962
GrantedAugust 4, 1964
Term endedAugust 4, 1981
Patent numberCA 692007 A
Classification (IPC)G01G
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.