Hydrogels with increased organic solvent soluble active agent loading capacity, their preparation and the use thereof
CA 1296459 C · Owner: Sikora, Joseph · Inventors: Mikes, John; Good, William R.; Sikora, Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydrogels with increased organic solvent soluble active agent loading capacity, their preparation and the use thereof Abstract of the disclosure, An organic solvent soluble active agent containing water-insoluble hydrophilic hydrogel comprising a copolymer of (A) a water-soluble monoolefinic monomer or a mixture thereof optionally containing up to 50 % thereof of one or more water-insoluble monoolefinic monomers and (B) a terminally diolefinic hydrophobic macromer containing polypropylene oxide or polytetramethylene oxide units prepared in the presence of an effective macromer expanding amount of a macromer soluble compound of the formula, R'?R"-O?nR''' where R', R", R''' and n are as …
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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
- Granted February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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.