Patent Yard Sign in
Expired Canadian patentCanada

Pre-wash compositions containing enzymes

CA 1263944 C · Owner: Munk, Barbara H. · Inventors: Munk, Barbara H.

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

of Disclosure, Compositions effective in removing protein fat and/or starch based stains as well as oil and grease based stains from fabrics comprise organic solvents admixed with surfactants and an enzyme component wherein the enzymes are dissolved in aqueous solution and the aqueous solution is, in turn dispersed as reversed micelles within the solvent/surfactant mixture. Encapsulating the enzymes in reversed micelles protects them from degradation by the solvents and thereby prolongs the effectiveness of the enzymes for extended periods of time. The total water content of the compositions is kept below 5 weight% so that the compositions' oil and grease stain removal ability remains …

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 December 19, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 19, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 23, 1985
GrantedDecember 19, 1989
Term endedDecember 19, 2006
Patent numberCA 1263944 C
Classification (IPC)C11D3/38

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedAug 23, 1985Patent grantedDec 19, 1989Term endedDec 19, 2006

Sources & verification

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