Low-dusting, free-flowing acrylamide polymer composition
CA 1066445 A · Owner: The Dow Chemical Company · Inventors: Savage, Albert B.; Krumel, Karl L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water-dispersible low-dusting, free-flowing, composition comprising (a) an acrylamide polymer (b) a, lower aliphatic polyol or polyalkylene glycol of up to 6000 molecular weight as an antidusting agent and (c) a, particulate free-flow aid. The acrylamide polymer is primarily of less than 0.5 mm particle size and has an average molecular weight of from 50,000 to 10,000,000. The antidusting agent is present in an amount of 0.05 to 1 percent based, on the weight of (a). The free-flow aid is preferably a for? of silica and is present in the amount of 1 to 40 percent, based on the weight of (b). The co positions of this invention contain much less free-flow aid than is known in the prior art.
Read the whole patent
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 November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 1996.
- 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.