Condom
CA 2037111 C · Owner: Hwang, Ying-Teh · Inventors: Hwang, Ying-Teh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A condom has a body a sperm cell extending, forward from the body and a vertical narrow flat neck between the body and the cell for the sperm to pass through in the cell. the sperm cell has an oval shape the lower, portion larger than the upper portion and the height is longer than the neck so that the sperm entering the cell may stay in the lower portion without few possibility to return through the neck to the body. Besides, a groove is provided at the front bottom of the body, conforming to the male sex organ.
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 February 26, 1991 and granted May 3, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2013.
- 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.