Process for increasing the solubility rate of a water soluble film
CA 2217827 C · Owner: W.R. Grace & Co.-Conn. · Inventors: Cook, Philip H. Jr.; Moore, Tina V. Lorenzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polymeric film includes at least one irradiated water soluble layer. A process for making a water soluble film includes the steps of extruding a water soluble film; and irradiating the water soluble film. Using electron beam irradiation a water soluble film's solubility rate can be increased.
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 October 8, 1997 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2019.
- 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.