Expired Canadian patentCanada
Improved vertical wicking structures from wet cross-linked cellulose fibers
CA 2016287 C · Owner: Bernardin, Leo J. · Inventors: Bernardin, Leo J.; Heimbach, Catherine J.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An absorbent web of wet crosslinked cellulose fibers which web has a density within the range of from about 0.08 to about 0.35 grams per cubic centimeter which web possesses improved vertical wicking properties.
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 May 8, 1990 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 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.
FiledMay 8, 1990
GrantedJuly 3, 2001
Term endedMay 8, 2010
Patent numberCA 2016287 C
Classification (IPC)A61F13/15 +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.