Expired Canadian patentCanada
Hair enclosing device
CA 2174251 C · Owner: Hansen, Derrick Ron · Inventors: Hansen, Derrick Ron
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 hair enclosing and protecting device comprising a piece of material that can be, easily and quickly attached to, and then encircle all or a portion of gathered hair.
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 April 16, 1996 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 16, 1996
GrantedJune 19, 2001
Term endedApril 16, 2016
Patent numberCA 2174251 C
Classification (IPC)A45D8/22 +1 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.