Extrusion coatable polyester film having an aminofunctional silane primer, and extrusion coated laminates thereof
CA 1321737 C · Owner: Swofford, Howard W. · Inventors: Swofford, Howard W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Oriented polyester film primer coated with a hydrolyzed aminosilane IS disclosed. The aminosilanes in the unhydrolyzed state have the formula:, (R1)aSi(R2)b(R3)c, wherein R1 is a functional group with at least one primary amino group; R2 is a hydrolyzeable group such as a lower alkoxy group an, acetoxy group, or a halide: and R3 is a nonreactive nonhydrolyzeable, group such as a lower alkyl or a phenyl group; with (a) being greater than or equal to 1; (b) being greater than or equal to 1; (c) being greater than or equal to zero; and with a+b+c=4. The preferred silane is N-beta-(aminoethyl)-gamma-aminopropyltrimethoxysilane having the formula:, H2N(CH2)2NH(CH2)3Si(OCH3)3. The hydrolyzed …
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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 August 31, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 31, 2010.
- 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.