Flexible, air-permeable plastic sheet
CA 2098505 C · Owner: Murakami, Masaki · Inventors: Suzuki, Migaku; Yamamoto, Masamitsu; Murakami, Masaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Here is disclosed a flexible and air-permeable plastic sheet comprising a plurality of first direction ribs (Y1 Y2, ...) each having opposite sides (2 3) extending in the, first direction (Y) and curved downward crossing a plurality of second direction ribs (X1, X2, ...) each having opposite sides (4, 5) extending in the second direction (X) and curved downward so that each pair of adjacent first direction ribs and each pair of adjacent second direction ribs crossing these first direction ribs define together an air-permeable vacant space. At each crossing (C1 C2, C3, C4), one of the ribs bulges upward and opposite side edges of this rib crosses the top (T1, T2) of the other rib. The …
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 November 6, 1991 and granted August 4, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.