Paper products containing a vegetable oil based chemical softening composition
CA 2200182 C · Owner: Phan, Dean Van · Inventors: Trokhan, Paul Dennis; Phan, Dean Van
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fibrous cellulose materials useful in the manufacture of soft absorbent paper , products such as paper towels facial tissues, and toilet tissue are disclosed. The paper products contain a vegetable oil based quaternary ammonium chemical softening compound. Examples of preferred vegetable oil based quaternary ammonium chemical softening compounds include dioleyldimethyl ammonium chloride (i.e. di(octadec-z-9-enyl)dimethylammonium chloride) (DODMAC) and dierucyldimethyl ammonium chloride (i.e. di(docos-z-13enyl)dimethylammonium chloride) (DEDMAC). Depending upon the paper product characteristic requirements, the saturatiuon level of the fatty acyl groups of the vegetable oils can be …
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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 September 14, 1995 and granted July 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2017.
- 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.