Fluoropolymer low reflecting layers for plastic lenses and devices
CA 2360903 A1 · Owner: Tatsuhiro, Takahasi · Inventors: Kaku, Mureo; Iwato, Satoko; Tatsuhiro, Takahasi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A one or two layer coating system has been developed for plastic substrates. The one coating system low reflecting layer consists of VF2/TFE/HFP. In the two coating system is the upper coating layer consists of TFE/HFP VF2/TFE/HFP, or TFE/Perfluorodioxole, and the lower coating layer consists of VF2/TFE/HFP, VF/TFE/HFP, VAc/TFE/HFIB, or TFE graft to PVOH. A new fluoropolymer composition was prepared for use in the coating systems prepared by the copolymerization of vinyl acetate tetrafluoroethylene, and , hexafluoroisobutylene.
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 March 15, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 15, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2022.
- 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.