Vacuumizing closure for vacuum pack containers
CA 1111803 A · Owner: Batchelor, John H. · Inventors: Batchelor, John H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
a reclosure device for vacuum pack containers and the like comprised of a, diaphram that seals with the opened end of the container and actuating means therefor to position it axially outward from an initially inward extension into the container thereby drawing a partial vacuum upon the contents within the said container.
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 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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.
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.