Expired Canadian patentCanada
Phosphorus-containing polymers for optical signal transducers
CA 2438648 C · Owner: Dorn, Ingmar · Inventors: Kohler, Burkhard; Dorn, Ingmar
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a phosphorus-containing polymer for coating dielectric , materials, to processes for its preparation and to its use as well as to an , optical , signal transducer having a coating of the polymer and to its use.
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 February 11, 2002 and granted April 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 11, 2002
GrantedApril 5, 2011
Term endedFebruary 11, 2022
Patent numberCA 2438648 C
Classification (IPC)G02B1/04 +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.