Use of halogen-containing organic stabilizers for 3-isothiazolones
CA 2055838 A1 · Owner: Derbyshire, Ronald L. · Inventors: Willingham, Gary L.; Derbyshire, Ronald L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of stabilizing 3-isothiazolones against chemical degradation in antagonistic environments by the use of certain activated halogen compounds is disclosed. Compositions including 3-isothiazolones and alkyl halohydantoins halo-substituted, triazinetriones, N-halosuccinimides p-toluenesulfonyl halides, haloacetic, acids and alkyl sulfamoyl halides are found to be particularly stable in metal working fluids and latex paints.
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 19, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 2013.
- 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.