Therapeutic cholesterol gallstone dissolution method
CA 2033509 A1 · Owner: The Regents Of The University Of California · Inventors: Hofmann, Alan F.; Schteingart, Claudio D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
57) Abstract, A method and apparatus are disclosed for treating a patient having cholesterol calculi which involves infusing into the bilary tract of said patient a C5-C6 ester ether or ketone having a boiling point in the range of 80°-140° C or a mixture thereof m an amount and at a flow rate effective to at least partially dissolve said calculi rapidly. The invention also encompasses dissolving cholesterol calculi by exposing such calculi to contact with effective quantities or those solvent compounds. The apparatus includes a high flow rate catheter pumping system for infusing a gallstone dissolution solvent into the gallbladder of a patient and aspiring the gallstone dissolution solvent …
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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 January 2, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 2, 2013.
- 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.