Polysaccharide graft polymers containing acetal groups and their conversion to aldehyde groups
CA 1296442 C · Owner: National Starch And Chemical Corporation · Inventors: Tsai, John Ji-Hsiung; Jobe, Patrick G.; Billmers, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polysaccharide graft polymers which comprise an acetal-containing or aldehyde-containing homopolymer or copolymer grafted to a polysaccharide base, represented as Sacch-g-(M')x or Sacch-g-(M')z and Sacch-g-(M")x or Sacch-g-(M)y-(M")z' have been prepared. M' and M" respectively represent repeating units derived from one or more ethylenically or allylically unsaturated monomers containing an acetal group or aldehyde group; M represents a repeating unit derived from one or more ethylenically or allylically unsaturated monamers other than the acetal-containing or aldehyde-containing monomer; x is at least 2 and y and z are at least l; A and A' are independently a lower alkyl or A and A' …
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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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
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Timeline
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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.