Patent Yard Sign in
Expired Canadian patentCanada

Imidazole derivatives ii

CA 1330341 C · Owner: Turski, Lechoslaw · Inventors: Biere, Helmut; Rohde, Ralph; Turski, Lechoslaw

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

Imidazole derivatives of general formula I (I), wherein, R1 means hydrogen, an optionally substituted C1-10 hydrocarbon or hetaryl residue, or a cyclic ether residue, R2 means hydrogen halogen, an optionally substituted, amino nitro, azide, thiocyanate or cyano group a linear or branched C1-10-alkyl residue optionally substituted with halogen, or -OR1 wherein R1 has the above-mentioned meanings, and, R1 and R2 jointly with the oxygen atom form a saturated or unsaturated 5- to 7-membered ring which can contain still another hetero atom R3 means hydrogen, a linear or branched C1-6alkyl group, or a C1-6-alkoxyalkyl group R4 means -COOR5, -CONR6R7, -CN, or , R5 meaning hydrogen a linear or …

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 21, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 21, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 13, 1988
GrantedJune 21, 1994
Term endedJune 21, 2011
Patent numberCA 1330341 C
Classification (IPC)C07D233/90 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedDec 13, 1988Patent grantedJune 21, 1994Term endedJune 21, 2011

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.