Razor
CA 2090403 C · Owner: Jacobson, Chester Frederick · Inventors: Jacobson, Chester Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A razor having a base member (12), spring fingers extending from the base member a plurality of razor blades (16), each of the razor blades (16) having a generally tubular wall (18) defining a central aperture (20) each of the razor blades (16) having, an integrally formed flange (32) on a first end (24) of the tubular wall (18) a free edge of each of the flanges comprising an annular cutting edge (28), a second end (32) of the tubular wall (18) having therein a plurality of the spring fingers (14) extending into the aperture (20), such that the spring fingers (14) within the tubular walls (18) permit multi-directional movement of the razor blades (16) responsive to pressures encountered …
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 September 16, 1991 and granted December 8, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 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.