Tampon and method of making same
CA 2283265 C · Owner: Milbrada, Edward John · Inventors: Milbrada, Edward John; Osborn, Thomas Ward Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Absorptive pads including catamenial tampons are provided which are characterized by O2 levels sufficiently reduced so as to reduce the introduction of air into the vaginal canal with a resulting reduction in the probability of production of toxic shock syndrome exotoxin during internal use of the pads.
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 March 11, 1998 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2020.
- 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.