Aperture razor system and method of manufacture
CA 2247002 A1 · Owner: Warner-Lambert Company · Inventors: Orloff, Glennis J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for forming a blade having circular apertures with sharpened edges. As opposed to the traditional grinding and deburring method the present invention utilizes, electrochemical machining electrical discharge machining, electrolytic machining laser-beam machining, electron-beam machining photochemical machining, ultrasonic, machining and other non-traditional methods to sharpen and form the blade edges. These manufacturing methods lend themselves to produce unlimited razor blade designs and structures.
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 14, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 14, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2020.
- 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.