Expired Canadian patentCanada
Lettuce packaging film
CA 1290675 C · Owner: Schirmer, Henry George · Inventors: Schirmer, Henry George
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multilayer laminate comprises a first perforated film of propylene homopolymer or copolymer and a second film, bonded to the first film and including a bonding layer of ethylene vinyl acetate copolymer and an outer heat sealable layer.
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
- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 19, 1989
GrantedOctober 15, 1991
Term endedOctober 15, 2008
Patent numberCA 1290675 C
Classification (IPC)B32B3/24 +2 more
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.