Method and composition for cleaning articles
CA 2094153 A1 · Owner: Smith, Graham J. · Inventors: Ferber, Gerald J.; Smith, Graham J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method and composition for cleaning articles made of, for example, metal, ceramic or glass. The composition of the invention comprises: one or more C9-C12 aromatic hydrocarbons of formula (I), wherein R is CH3 R2 is hydrogen, or a straight-chained or branched lower alkyl and R3 is, hydrogen or a C1-C5 straight-chained alkyl; and a C7-C10 organic polar component, wherein the solvent composition comprises from about 99 to about 1 weight percent of the aromatic hydrocarbon and from about 1 to about 99 weight percent of the organic polar component. The invention also relates to a method of cleaning a dirty article, comprising the steps of: contacting the dirty …
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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 October 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 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.