Nonionic soil release agents
CA 2106217 A1 · Owner: Pan, Robert Y. L. · Inventors: Honsa, Sandra L.; Gosselink, Eugene P.; Pan, Robert Y. L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nonionic soil release agents having both oxyethylene and oxyiso-propyleneoxy units are useful in laundry compositions especially , in liquid through-the-rinse fabric softeners as well as in, detergent compositions. Thus the reaction product of, CH3(OCH2CH2)16OH dimethyl terephthalate, polyethylene glycol 1500 1,2-propylene glycol and ethylene glycol preferably as a, polymer/oligomer in which the ratio of incorporated ethylene glycol:propylene glycol is about 1.5:1, is added to a liquid fabric softener with DTDMAC. Fabrics rinsed in a bath containing this composition are both softened and afforded a soil release finish.
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
- Filed March 18, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2014.
- 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.