Breathable backing
CA 2044170 C · Owner: Sablotsky, Steven · Inventors: Sablotsky, Steven; Gentile, Cheryl M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition comprising a flexible backing for a transdermal drug preparation with a water vapor transmission rate about equal to or in excess of that of ethylene vinyl alcohol copolymer, namely equal to or in excess of, at one mil thickness, of about 2 to 4 grams and more preferably in excess of 6 grams per 29 hours per 100 square inches at 40°C and 90% relative humidity and an oxygen transmission rate equal to or less than ethylene vinyl alcohol copolymer, namely at one mil thickness equal to or less than about 0.01 to 0.1 cubic centimeters per 100 square inches measured over 24 hours at 1 atmospheric pressure, 20°C and 65% relative humidity. Patent/M/19SM/03-10-90
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 January 10, 1990 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2012.
- 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.