Patent US3943273A successfully refreshed from Google Patents.
US3943273A
Expired / Lapsed
US
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Electrically conducting plastic pipe system
Assignee: Wavin BV
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Filing: 1974-03-04
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Granted: 1976-03-09
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Expires: 1994-03-04
Abstract
Abstract A conducting plastic pipe system comprising a male plastic pipe part and a female plastic pipe part with conducting covering layers which are interconnected by means of a conducting sealing ring between the male and female part. In case of outer covering layers on the pipe part the covering layer extends onto the inner side of the muff end of the female pipe part.
Inventors
- 👤 Warner Jan de Putter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:12
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L47/08; F16L25/00; F16L25/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A pipe connection comprising a male pipe part and a female pipe part both of thermoplastic material, each pipe part having on at least its outer surface a continuous coating of thermosetting material connected with the surface of the male and female pipe part, said coating containing a quantity of particles that are electrically conductive, said coating on each pipe part being connected with means for discharging an electric charge, and a conductive rubber sealing ring engaging the outer coating on said male pipe part and the outer coating on said female pipe part by a part of said coating extending on the inner side of said female part.
Claim 2
Dependent Claim
109 words
A pipe connection comprising a male pipe part and a female pipe part both of thermoplastic material, each pipe part having on at least its outer surface a continuous coating of thermosetting material connected with the surface of the male and female pipe part, said coating containing a quantity of particles that are electrically conductive, said coating on each pipe part being connected with means for discharging an electric charge, and a conductive rubber sealing ring engaging the outer coating on said male pipe part and the outer coating on said female pipe part by a part of said coating extending on the inner side of said female part.
Claim 3
Dependent Claim
26 words
A pipe connection according to claim 1, characterized in that said sealing ring contains carbon particles of a range from 10 to 20% of carbon particles.
Claim 4
Dependent Claim
43 words
A pipe connection according to claim 2, characterized in that the thermoplastic female pipe part consists of a pipe part having a socket formed thereon, while said conductive coating extends throughout the outer surface and on the inner surface of the socket part.
Claim 5
Dependent Claim
15 words
A pipe connection according to claim 1, characterized in that the pipe connection is grounded.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |