3-(4'-aminobutylamino)propylaminobleomycin derivatives, and processes of the preparation thereof
CA 1270600 C · Owner: Muraoka, Yasuhiko · Inventors: Umezawa, Hamao; Muraoka, Yasuhiko; Fujii, Akio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a 3-(4'-aminobutylamino) propylaminobleomycin having low pulmonary toxicity, which expressed by the following general formula, BX-NH-(CH2)3-A-(CH2)4-B, wherein BX represents a residue remaining after removing a hydroxyl group from the carboxyl group of bleomycinic acid A represents a group of the, formula, or in which R1 represents (i) a hydrogen atom (ii) an alkyl group having, 1 to 10 carbon atoms or (iii) a methyl group or a methyl group substituted by at least one of a phenyl group and a cycloalkyl group having 5 to 13 carbon atoms,which substituents may be unsubstituted or further substituted in more than one position by one or more substituents selected from the group …
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 June 19, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 2007.
- 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.