Esperamicin derivatives
CA 1299567 C · Owner: Bristol-Myers Company · Inventors: Golik, Jerzy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel N-acetyl derivatives designated N-acetylesperamicins A1, A2 and A1b are prepared by acetylating known antitumor antibiotics. The new derivatives exhibit both antimicrobial and antitumor activity and have the structures, wherein R1 and R2 are hydrogen or and R3 is -CH(CH3)2 or CH2CH3.
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
- Granted April 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 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.