2-hydrazono-4,6-dinitrobenzthiazolones
CA 1300605 C · Owner: Bayer Aktiengesellschaft · Inventors: Wehling, Klaus; Engel, Aloysius; Hugl, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2-Hydrazono-4,6-dinitrobenzthiazolones ABSTRACT OF THE DISCLOSURE, 2-Hydrazono-4,6-dinitrobenzthiazolones of the formula, in which, X1 represents hydrogen C1-C4-alkyl, C1-C4-sulphoalkyl or C1-C4 -sulphoalkyl or C1-C4-sulphatoalkyl and, X2 represents hydrogen or -SO2X3, where X3 may represent hydrogen, C1-C8-alkyl or optionally substituted aryl and, X1 also represents a double bond between the cyclic nitrogen atom and the carbon atom 2 according to the formula II below:, where X2 has the meaning specified under the above formula. These hydrazones may be employed in the preparation of azo dyestuffs and as color formers for detecting of biological substances, and in the determination of H2O2.
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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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 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.