Patent Yard Sign in
Expired Canadian patentCanada

Stable, pourable aqueous bleaching compositions comprising solid organicperoxy acid and at least two polymers

CA 1340308 C · Owner: Torenbeek, Reinder · Inventors: Torenbeek, Reinder; Ploumen, Jan Joseph Hubert

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

This disclosure relates to pourable bleaching compositions comprising a solid substantially water-insoluble organic peroxy acid stably suspended in an aqueous medium containing at least two polymers wherein the first polymer is one or more natural gums and the second polymer is selected from the group consisting of polyvinyl alcohol, one or more cellulose derivatives and mixtures thereof. The bleaching composition also may contain an electrolyte. The preferred organic peroxy acid is 1,12-diperoxydodecanedioic acid. The preferred first polymer is xanthan gum. The second polymer is preferably a cellulose ether.

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 January 12, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2016.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 21, 1989
GrantedJanuary 12, 1999
Term endedJanuary 12, 2016
Patent numberCA 1340308 C
Classification (IPC)D06L4/12 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedJune 21, 1989Patent grantedJan 12, 1999Term endedJan 12, 2016

Sources & verification

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