Anhydrous topical compositions which dry rapidly on contact
CA 2123118 C · Owner: Mackles, Leonard · Inventors: Chavkin, Leonard; Mackles, Leonard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A substantially anhydrous composition suitable for topical application which contains 10-80 % by weight of an anhydrous base which is liquid or semi-solid at room temperature; and 5-50 % by weight of polyolefin microspherical particles having an average diameter of less than 25 microns the amount of microspherical , particles constituting at least 30 % by weight of the anhydrous base.
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 8, 1992 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2014.
- 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.