Irrigating and lavage compositions
CA 2028907 A1 · Owner: Dougherty, Emery W. · Inventors: Dougherty, Emery W.; Heyde, John B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Irrigants to be used with vibratory scaling apparatus and lavage are provided. The irrigants of the invention are characterized in that they contain a surfactant of the plaque and endotoxin solvating type in an amount of about 0.01 to about 5% of said composition and water and have the characteristics of being a free-flowing liquid free of substances having high humectant properties and drying with a relatively nonsticky residue. Other optimal ingredients are calcium chelating compounds and taste enhancers and alcohol. The irrigants are formulated so that they have minimal stickiness on drying, minimal foaming and do not gum-up the apparatus in which they are used. Also provided is a method …
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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 30, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2012.
- 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.