Films for packaged articles eliminating air entrapment
CA 2020181 A1 · Owner: Tucker, John Halbert · Inventors: Tucker, John Halbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Packages containing articles with smooth surfaces can be prepared without entrapment of air between the packaging film and the smooth surface of the articles by selecting a packaging film having at least one surface which comprises a polymer which in film form exhibits a specular gloss of at least about 20 measured at an angle of 20 degrees and a synthetic amorphous silica having particle size of about 0.5 to about 50 micrometers. AD-5587 35
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 29, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2012.
- 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.