Expired Canadian patentCanada
Bent wire spring module with lock
CA 1305500 C · Owner: Webster Spring Co. Inc. · Inventors: Hagemeister, Robert C.
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 bent wire spring module embodying a clamp element at the upper end interengageable with the cross wire of a grid frame without requiring the formation of deviations in the cross wire to which it is attached.
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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 July 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 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 29, 1988
GrantedJuly 21, 1992
Term endedJuly 21, 2009
Patent numberCA 1305500 C
Classification (IPC)A47C23/05
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.