Composite bolus manufacture and use
CA 2021635 A1 · Owner: Greengrass, Jane · Inventors: Johnson, Alan E.; Greengrass, Jane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite bolus for sustained release of a sparingly soluble organic active material in the reticulo-rumen of an animal is produced by mixing together an adhesive comprising one or more insoluble thermosetting resins, which are highly substantive to glass when cured with an equal or greater weight of a dispersion medium comprising one or more hydrophilic organic liquids which are miscible with or dissolve the uncured adhesive and phase separate from the adhesive when it is cured to form, a liquid binder; mixing the binder so formed with glass or other inorganic particles and particles of sparingly soluble active material to form a cake the ratio of, binder to particles being selected to …
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 July 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 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.