Anti-fogging material
CA 1290507 C · Owner: Kurasawa, Morio · Inventors: Kurasawa, Morio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A matrix of a glass or a plastic is mixed with 1% to 10% of a niobium substance, 1% to 10% of a magnesium compound 1%, to 10% of barium fluoride, and 5% to 30% of lead the, percentages indicating the ratios by weight of these substances to that of the matrix. The mixture is heat-molded to form an anti-fogging material.
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
- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- 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.