Crystalline zeolite (ecr-1) and process for preparing it
CA 1263102 C · Owner: Vaughan, David E.W. · Inventors: Vaughan, David E.W.; Strohmaier, Karl G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A synthetic crystalline zeolite is provided characterized by having a composition, in terms of mole ratios of oxides, in the range:, 0.1 to 0.02 R20:0.90 to 0.98 Na20:A1203:5 to 20 Si02:0 to 8 H20, wherein R represents a bis-(2-hydroxyethyl) dirnethylammonium group, and characterized by having atoms arranged in a structure as indicated by a specified x-ray powder diffraction pattern. The zeolite may be prepared by crystalLization from an aged reaction mixture of an oxide of sodium, a bis-(2-hydroxyethyl) dimethylammonium salt, water, a source of silica a, source of alumina, and sodiurn aluminosilicate nucleating seeds in specified relative amounts.
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 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 21, 2006.
- 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.