Copolymers of ethylene oxide as antistatic additives
CA 1318740 C · Owner: Yu, Simon Hsiao-Pao · Inventors: Yu, Simon Hsiao-Pao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antistatic polymeric composition consisting of at least one antistatic additive of an ethylene oxide copolymer in the range of from about 3 to about 30% by weight and being a solid nonionic, material and having a dilution solution viscosity of greater than 0.25 and preferably having an average molecular weight greater than 20,000; and a polymeric material in the range from about 70 to about 97% by weight. The ethylene oxide copolymer comprises ethylene oxide in the range of from about 5 to about 95% by weight and at least 1 comonomer selected the group consisting of cyclic ethers, cyclic acetals and cyclic esters, in the range of from about 95 to about 5% by weight. The polymeric …
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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 June 1, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 1, 2010.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.