Masking material
CA 2480902 A1 · Owner: Itou, Kuninori · Inventors: Ogawa, Masanori; Itou, Kuninori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A masking material (11) which is rich in heat resistance and is repeatedly usable. The masking material (11) is made of a polymer alloy having a seaisland structure comprising a polyolefin as the continuous phase and one or more engineering plastics selected from the group consisting of a methylpentene copolymer, polysulfone, polyether sulfone polyphenylene , sulfide, polyphenylene ether polyamideimide, polyetherimide, and , polyetheretherketone as the dispersed phase.
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 September 24, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 24, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 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.
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.