Raw polymer powder of a modified tetrafluoroethylene polymer having a high bulk density and a good powder flow index and also a process for the manufacture and use thereof
CA 1215496 A · Owner: Hoechst Aktiengesellschaft · Inventors: Sulzbach, Reinhard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, Raw polymer powder of a modified tetrafluoroethylene polymer having a high bulk density and a good powder flow index and also a process for the manufacture and use thereof, Novel granular. free-flowing non-melt-fabricable, raw polymer powders of tetrafluoroethylene polymers consisting of 0.004 to 0.075 mole % of polymerized units of a perfluoroalkyl vinyl ether and of tetrafluoroethylene units, are described. These powders have an average particle diameter of 450 to 1.400 µm. a bulk density of at least 570 g/l, a powder flow index of ? 5 seconds/50 g and a grain stability of ? 5.5 seconds/50 g. They are prepared direct by suspension polymerizing TFE in the presence of the …
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 December 16, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 2003.
- 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.