Canadian application, no grantCanada
Serrated doctor blades
CA 2487772 A1 · Owner: S.D. Warren Company · Inventors: Carrier, Gordon Eugene
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 doctor blade (10) is provided that is suitable for use in the manufacture of paper, particularly for use in calenders. The doctor blade includes a plurality of serrations (24) in the leading edge.
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 4, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2025.
- 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 4, 2003
GrantedNo grant recorded
Term endedJune 4, 2023
Patent numberCA 2487772 A1
Classification (IPC)D21G3/00
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.