Sunscreen compositions
CA 2338935 A1 · Owner: Tanner, Paul Robert · Inventors: Irwin, Christopher; O'Donoghue, Margaret Ann; Tanner, Paul Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to compositions suitable for use as sunscreens which comprise a UVA sunscreen active and a carrier suitable for application to the skin. These compositions are substantially free of benzylidene camphor derivatives and provide excellent stability efficiency, and UV protection , efficacy in a safe economical and aesthetically appealing manner. The compositions have a Sunscreen Efficiency Index of at least about 1.75 a UVA , Efficacy Value of at least about 0.5 a UVA Photostability Index of at least about 0.85, a UVB Photostability Index of at least about 0.85 and a , Transparency Value of less than about 10. Methods of using the compositions are also …
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 July 29, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2021.
- 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.