US4428223B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4428223B1 - - Google Patents
Assignee: JPMorgan Chase Bank NA
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Filing: 1982-04-07
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Granted: 1989-07-04
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Expires: 2002-04-07
Abstract
Abstract Apparatus for periodically testing the operation of safety valves on pressure apparatus or vessels, comprises a load-bearing structure (P) fixedly arranged with respect to the pressure apparatus (R), a thrust generating assembly (7) cooperating with said load-bearing structure (P), and for gripping the safety valve (V) being tested. A dynamometer device (9) cooperates with the thrust generating assembly (7), and measures the force applied by the thrust generator (7) to the safety valve (V).
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/0061; F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/06; F16K37/00; F16K37/0075; F16K37/0083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |