Canadian application, no grantCanada
Production and use of improved composite fluid separation membranes
CA 2127033 A1 · Owner: Praxair Technology, Inc. · Inventors: Bikson, Benjamin; Katz Nelson, Joyce
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Multilayer composite membranes are produced in a one-step coating process that provides an interior gas separation layer and an external defect sealing 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
- Filed June 29, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 29, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2016.
- 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 29, 1994
GrantedNo grant recorded
Term endedJune 29, 2014
Patent numberCA 2127033 A1
Classification (IPC)B01D67/00 +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.