Expired Canadian patentCanada
Tissue expander
CA 2012605 C · Owner: Manders, Ernest K. · Inventors: Manders, Ernest K.
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 tissue expander for expanding hair to cover temple bald recesses includes a base having a central arm and a pair of end arms separated by a pair of concave recesses and an expandable cover joined to the edge of the base.
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
- Filed March 20, 1990 and granted December 7, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2012.
- 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 20, 1990
GrantedDecember 7, 1993
Term endedMarch 20, 2010
Patent numberCA 2012605 C
Classification (IPC)A61B90/00 +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.