Multi-ply facial tissue paper product comprising biodegradable chemical softening compositions and binder materials
CA 2173716 A1 · Owner: Trokhan, Paul Dennis · Inventors: Van Phan, Dean; Kelly, Stephen Robert; Trokhan, Paul Dennis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multi-ply facial tissue paper products comprising biodegradable chemical softener compositions and a combination of a wet strength binder, either permanent or temporary, and a dry strength binder is disclosed. The multi-ply facial tissue paper products contain a biodegradable chemical softening composition comprising a mixture of biodegradable quaternary ammonium compound and a polyhydroxy compound. Preferred biodegradable quaternary ammonium compounds include diester dialkyl dimethyl ammonium salts such as diester di(touch hardened)tallow dimethyl ammonium chloride and/or diester di(touch hardened)tallow dimethyl ammonium methyl sulfate. Preferred polyhydroxy compounds are selected from …
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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 October 17, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 17, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 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.
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.