Plaque disclosing agent
CA 1237989 A · Owner: Vipont Laboratories, Inc. · Inventors: Southard, George L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Salts of sanguinarine either pure salts or a mixture, of salts precipitated from extracts of plants selected from the group consisting of Sanguinaria canadensis Macleya cordata, Corydalis sevctvozii, C. ledebouni Chelidonium majus, and, mixtures thereon are effective agents for disclosing plaque in the oral cavity under long wavelength ultraviolet light.
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
- Granted June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2005.
- 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.