Polyaluminumchlorosulfates and preparation and uses thereof
CA 2089697 C · Owner: Murphy, John David · Inventors: Murphy, John David; Suty, Herve; Schuffenecker, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to high basicity water-soluble polyaluminumchlorosulfate, having the formula: A1(OH)aC1b(SO4)cMdNe, in which M is an alkaline-earth metal; N is an alkaline metal; a, b, c, d and e are numbers such that: 1.95<a<2.4;0<c<0.15;0<d<0.16;0<e<1.7;a+b+2c=3+2d+e; said polyaluminumchlorosulfate yielding a content of polymeric aluminum A113 of at least 1 mol % where said polyaluminum chlorosulfate is dissolved in water to form a solution which has an aluminum concentration of 0,01 M and said polyalumi-, numchlorosulfate having a basicity higher than 65%.
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
- Filed February 17, 1993 and granted May 27, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2015.
- 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.