Antibiotics neothramycin a and b from streptomyces
CA 1056747 A · Owner: Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai · Inventors: Hamada, Masa; Umezawa, Hamao; Naganawa, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There are disclosed two new antibiotics neothramycin A having the formula:, and neothramycin B having the formula: which are potent inhibitors of the growth of leukemia cells e. g. Leukemia, L-1210 cells in mice. They are produced by controlled fermentation of the strain of Streptomyces (identified as A.T.C.C. 31123) under submerged conditions in a nutrient medium containing a carbon source and a nitrogenous nutrient until a substantial amount of antibiotics is produced in the nutrient medium.
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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 June 19, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 1996.
- 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.