Process for preparing sintered shapes and compositions for use therein
CA 2083430 A1 · Owner: Burk, W. Michael · Inventors: Quinn, Robert E.; Burk, W. Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2457B, Title: PROCESS FOR PREPARING SINTERED SHAPES AND COMPO- SITIONS FOR MAKING THE SAME, Abstract of the Invention The invention relates to a method of preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising (A) at least one inorganic powder with (B) at least one polymer derived from (a) at least two sulfo monomers or (b) a combination of (i) a sulfo monomer with (ii) at least one monomer selected from acrylic compounds, acrylonitriles vinyl lactams and, vinyl pyrrolidones and maleic acids anhydrides or salts, provided the mixture is substantially free of polysaccharide; (2) sintering the body. Inorganic shapes made from the compositions of …
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 November 20, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2014.
- 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.