Acrylic silicate compositions and methods and highly oxygen-permeable polyacrylates made therefrom
CA 1303053 C · Owner: Fused Kontacts Of Chicago · Inventors: Chapman, Dwain R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new composition of matter is an acrylic silicate of the type having the general formula:, where in R = alkyl, aryl or H, R' = R or OR, Y = alkyl vinyl, aryl, or fluoroalkyl, Z = , or B A = Y, Z or H, and, B = oxyalkyl, oxyaryl oxyfluoroalkyl, oxyalkyl-, acrylate, alkyl esters aryl esters, fluoro-, alkyl esters, or acrylic esters. These compositions are useful in the manufacture of corneal contact lenses.
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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
- 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.