Safety razors
CA 2190269 C · Owner: Gilder, Bernard · Inventors: Gilder, Bernard; Terry, John Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A safety razor blade unit has a guard (2) a cap (3), and three parallel blades (11 12, 13) mounted between the guard and cap at, least one of the blades, guard and cap being movable from a non-shaving position to modify a blade exposure dimension and to attain a, modified blade geometry in which the exposure of the first blade (11) is not greater than zero and the exposure of the third blade (13) is not less than zero. At least one of the cap (2) and guard (3) can be movable against the force of a spring (20 or 21) from a non-shaving position in which all the blades between the guard and cap have their edges disposed below a plane tangential to the skin contacting surfaces of the guard and …
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 21, 1996 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 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.
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.