Process for insert molding wet-shaving razor unit and unit made therefrom
CA 2044958 C · Owner: Butlin, Edward S. · Inventors: Conrad, William T. Jr.; Butlin, C. Edward; Butlin, Edward S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a wet-shaving unit and a process for making same by injection molding. The present invention is adaptable for addition to conventional razor blade manufacturing methods and existing manufacturing apparatus and facilities. Moreover the present process results in a product which significantly reduces or eliminates entirely undesirable blade distortion and vibration.
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 June 19, 1991 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.