Polyoxyalkylene glycol gelatin capsule fill formulations comprising crosslinked carboxylic copolymers
CA 2296016 C · Owner: Rheox, Inc. · Inventors: Reynolds, William; Bayless, Ronnie E.; Laba, Dennis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
Disclosed are fill compositions suitable for carrying pigment and encapsulation within gelatin capsules comprising: (a) a polyoxyalkylene glycol having a mean molecular weight of from about 200-500; (b) glycerol; (c) water; (d) an oleaginous material; (e) a carboxylic copolymer; and (f) a neutralizing agent for the carboxylic polymer in an amount effective to neutralize at least about 75 % of the carboxylic acid groups on the polymer. Also disclosed are gelatin capsules containing such compositions and methods for preparing the fill compositions.
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.
Why it's free to use
- Filed July 15, 1998 and granted September 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 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.