Soft contact lens processing aid
CA 2036294 C · Owner: Bausch & Lomb Incorporated · Inventors: Druskis, Robert Joseph; Milne, Rose Ann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for polishing hydrophilic contact lenses which comprises applying a polish consisting of a substantially water area material that in solution acts as a surfactant and an optional abrasive material to the lens surface to be polished and applying a moving polishing tool to the lens.
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 February 13, 1991 and granted June 5, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 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.