Water soluble drug complex and method for production of same
CA 1238853 A · Owner: Welfide Corporation · Inventors: Kagitani, Yoshio; Suyama, Tadakazu; Fukushima, Tsunekazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method of producing a water-soluble complex comprising a water-insoluble drug and a phospholipid, comprising the steps of (1) dissolving a water-insoluble drug and a phospholipid in an organic solvent, (2) removing the solvent to leave behind a drugcontaining phospholipid film, (3) suspending the resulting film in an aqueous solution, (4) ultrasonicating the film (5) centrifuging the resulting suspension and (6), recovering the lowermost layer of the resulting sediment to yield the water-soluble complex. The above complex can be administered parenterally as well as by the oral and other routes, and is so rich in the drug component that a remarkably increased drug …
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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 July 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2005.
- 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.