Novel electrorheological (er) fluid based on amino acid containing metal polyoxo-salts
CA 2093101 A1 · Owner: Sudbury-Holtschlag, Joan · Inventors: Kadlec, Donald A.; Conway, Lori J.; Sudbury-Holtschlag, Joan
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 an, electrorheological fluid composition comprising a dispersion of a plurality of solid particles in an electrically non-conducting liquid, the improvement comprising using as said solid particles a composition having the general formula:, (M)P(H2O)x(OH)yqcArd ? Bz ? nH2O wherein M is a metal cation or a mixture of metal cations at various ratios; p is the total valence of M and has a value of greater than zero; x is zero or has a value greater than zero, y is zero or has a value greater than zero with the, proviso that only one of x or y can be zero at any given time; q has a value of p minus y with the proviso that q has a value of at least one; c has a …
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 March 31, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 31, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 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.