Expired Canadian patentCanada
Stiffening and reinforcing element and/or retention element
CA 1107879 A · Owner: Ehrnford, Lars E. M. · Inventors: Ehrnford, Lars E. M.
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 composition for reinforcing dental composites or retaining implant materials has a porous three dimensional newwork of organic filaments fused to each other at their point of contact.
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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 August 25, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 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.
FiledMarch 14, 1977
GrantedAugust 25, 1981
Term endedAugust 25, 1998
Patent numberCA 1107879 A
Classification (IPC)A61K6/00 +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.