A process for producing suppositories by compression and suppositories obtained by the process
CA 2111697 C · Owner: Farmaceutisk Laboratorium Ferring A/S · Inventors: Halskov, Soren
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Suppositories which may have a considerably higher content of an active drug than ordinary suppositories, are produced by compressing a suppository mass, which contains a considerable amount of a polyethylene glycol having a molecular weight of at least 4000, preferably 6000. The polyethylene glycol constitutes 20-50 % by weight of the suppository mass, which moreover contains microcrystalline cellulose and/or other additives common in the production of drugs. The obtained suppositories are more convenient to store and use, easier to produce and considerably more concentrated with respect to active substance (up to 75 % by weight) than traditional melt-moulded suppositories.
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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 June 16, 1992 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 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.