Self-expanding and reclosable flexible pouch
CA 2113273 C · Owner: Hammond, Edward Percy · Inventors: Cook, Charles Denver; Hammond, Edward Percy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sealed, self-expanding, reclosable, flexible pouch (20) having a pair of extensible stays (50) located in the throat area of the pouch. The extensible stays (50) are biased toward a circular configuration but are initially held substantially flat in a stressed condition by the pouch's sealed top portion (31). When the pouch's top portion is removed, the the extensible stays (50) expand to their relaxed expanded configuration and thereby expand and open the throat area (52) of the pouch. An inwardly oriented male securement means (54) is attached to one extensible stay (50) and extends along the throat area (52) of the pouch. A complementary inwardly oriented female securement means (56) …
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 June 26, 1992 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 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.