Technique for pressurizing a sealed article
CA 1066242 A · Owner: Wasserman, George J. · Inventors: Desatnick, Allen H.; Wasserman, George J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A technique for controlling the pressure in a closed, sealed article, such as a tennis ball or the like. A needle having a sharp forward, outer end adapted to, puncture the article includes a passage in its rear end which communicates with a flow orifice in the side of the needle, between the ends of the needle. Means are provided at the outer end of the needle to carry a resilient sealing plug. The sealing plug may be a separate plug element attached to the tip of the needle before the needle punctures the article of the plug may be cut directly from the article wall as the sharp forward end of the needle advances through the wall. The article is punctured by the needle to expose the flow …
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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
- Granted November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 1996.
- 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.