Ph reducing formulation for a tampon
CA 2420834 C · Owner: Benita, Simon · Inventors: Kluger, Ram; Stern, Theodor; Benita, Simon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A formulation effective in reducing the pH in a menstruating vagina or in a tampon inserted therein to below pH 5.5 comprising (a) 3-80 % by weight of a , solid organic acid polymer; (b) 92-15 % by weight of a solid organic acid; and (c) 5-30 % of a wetting agent. Also disclosed is a delivery system for releasing an active agent comprising: (a) a deposition comprising the active agent; and (b) a polymeric support on which the deposition is deposited. The delivery system is especially useful in a catamenial tampon for insertion in a human vagina which comprises (a) an inner core comprising an absorbent material; (b) an outer layer comprising a liquid permeable material; and (c) the …
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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 May 11, 2001 and granted June 28, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2023.
- 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.