Patent Yard Sign in
Expired Canadian patentCanada

Polymerizable carbamoyloxyalkyldicarboxylic acid esters carrying hydroxyl groups, a process for their preparation and their use

CA 1287641 C · Owner: Hoechst Aktiengesellschaft · Inventors: Just, Christoph; Plath, Dieter; Walz, Gerd

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

Polymerizable carbamoyloxyalkyldicarboxylic acid esters carrying hydroxyl groups, of the general formula (I) (I), in which R1 represents hydrogen or allyl or hydroxyalkyl having in each case 1 to 30 carbon atoms in the alkyl radical, R2 represents alkyl or hydroxyalkyl having in each case 1 to 30 carbon atoms in the alkyl radical or the radical, subject to the proviso that R1 is hydrogen and x is an integer from 2 to 20, R3 represents linear or branched alkylene having 2 to 5 carbon atoms, R4 represents hydrogen or methyl and R5 represents hydroxyalkyl or hydroxyaminoalkyl having in each case 2 to 20 carbon atoms in the alkyl radical or an alkyl radical of this type which also contains …

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 August 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 7, 1986
GrantedAugust 13, 1991
Term endedAugust 13, 2008
Patent numberCA 1287641 C
Classification (IPC)C07C271/22 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedFeb 7, 1986Patent grantedAug 13, 1991Term endedAug 13, 2008

Sources & verification

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