Vacuum packing apparatus for perishable foods
CA 2000047 A1 · Owner: Scanlon, Gregory P. · Inventors: Scanlon, Gregory P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Vacuum Packing Apparatus For Perishable Foods Abstract: A plastic container (8) has a lid (14) sealed with Oring (16) and has a hole (20) in lid (14) over which is fitted a cup-shaped valve (28) held loosely in position by bolt (22) which passes through hole (20) and is secured by spaced-apart locknut (24). A vacuum source (33) is connected by hose (46) to rubber cup (38) which can be placed over cup-shaped valve (28) to evacuate air from container (8), after which cup (38) is removed by squeezing with hand, causing cup-valve (28) to seal against flat surface of lid (14) by atmospheric pressure. Container (8) is then placed under refrigeration for long term preservation of its contents.
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 October 2, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2011.
- 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.