Molded resin pipe joint and process for production thereof
CA 1096786 A · Owner: Sekisui Kagaku Kogyo Kabushiki Kaisha · Inventors: Fujiwara, Sigeharu; Mitooka, Kenji; Mayumi, Masakatsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipe joint of a reinforced resin having a structure in which the wall of at least a socket portion consists of an inside surface layer composed of a cured product of a reinforced resin molding material, an outside surface layer composed of a cured product of a reinforced resin molding material and an, interlayer between those layers composed of a cured product of a resin mortar. The above pipe joint can be molded by (1) forming an uncured inside surface layer composed of a resinimpregnated reinforced molding material on the peripheral surface of a core mold; (2) seating a resin mortar on the inner surface of a split mold and molding the surface of the coated resin mortar by a former …
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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 March 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 1998.
- 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.