Hair spray package with low volatile organic compound emission
CA 2073972 C · Owner: S.C. Johnson & Son, Inc. · Inventors: Sramek, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved aerosol hair spray packages have reduced volatile organic compound emission during the useful life of the packages. A hair spray composition (3, 25) is packaged in either a self-propelled aerosol hair spray package (1) or a pump spray hair pray package (20) containing a low delivery rate discharge means (6 23). The , hair spray composition (3, 25) contains a combination of at least two polymers in weight ratios of 99;1 to 1;99 differing in weight average molecular weight by at least 1.5 one of, which is required to have a number average molecular weight of at least 100,000. This blend of polymers combines with the low delivery rate discharge means -0.2-0.38 grams per second far …
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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 January 11, 1991 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 2013.
- 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.