Lignosulfonate-based graft polymers, their preparation and uses
CA 1096090 A · Owner: Technion Research And Development Foundation Ltd. · Inventors: Zaslavsky, Dan; Rozenberg, Lev V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to new graft polymers obtained from lignosulfonate and d monomer selected from acrylic acid, methacrylic acid and mixtures thereof at a pH between 1.5 to 4 in the presence of an initiator. The new graft polymers have been found to be very useful as soil conditioners and as binding reagents for agglomerating single particles of particulate materials. The graft polymers according to the invention are obtained in the form of an aqueous solution which may, be transformed into a powder by spray drying. As soil conditioners they may be applied by spraying alone or, admixed with fertilizers or pesticides and also combined with the operation of planting and soil …
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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 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 17, 1998.
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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.