Formaldehyde-free latex and fabrics made therewith
CA 1279744 C · Owner: Goodrich(B.F.) Company (The) · Inventors: Shah, Pravinchandra K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A latex that is devoid of formaldehyde-containing monomers in polymerized form does not evolve formaldehyde nor decomposes to produce formaldehyde is used in the production of impregnated or treated paper and woven and nonwoven fabrics. The latex is produced by polymerizing a monomer charge containing at least one principal monomer and a crosslinking agent combination consisting of 0.1 to 10 weight parts of a monounsaturated dicarboxylic acid containing 4 to 6 carbon atoms and 0.1 to 10 weight parts of an amide containing 3 to 8 carbon atoms that does not produce formaldehyde, based on a total of 100 weight parts of all monomers that are polymerized. The articles made with the cured latex …
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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 January 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 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.