Expired Canadian patentCanada
Button with grommet
CA 1309231 C · Owner: Acker, Charles W. · Inventors: Acker, Charles W.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Snap fastener uses a grommet attached to a first layer of fabric and defining a passage. A unitary button and shank is designed to have the shank attach to the grommet with a snap action and on its free end to attach to a second layer of fabric.
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 October 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 12, 1988
GrantedOctober 27, 1992
Term endedOctober 27, 2009
Patent numberCA 1309231 C
Classification (IPC)A44B1/38
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.