US3566675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for pressure testing hollow bodies
Assignee: WEAN IND Inc
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Filing: 1969-02-06
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Granted: 1971-03-02
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Expires: 1989-02-06
Abstract
Abstract METHOD OF AND APPARATUS FOR TESTING A LENGTH OF PIPE BY FIRST FILLING THE PIPE WITH A TEST LIQUID BY DRAWING THE LATTER INTO THE PIPE BY VACUUM UNTIL A PREDETERMINED QUANTITY OF TEST LIQUID EMERGES FROM THE PIPE THEREBY ASSURING COMPLETE FILLING THEREOF, AND INTRODUCING SUFFICIENT ADDITIONAL TEST LIQUID INTO THE FILLED PIPE FROM A HIGH PRESSURE SOURCE UNTIL THE DESIRED TEST PRESSURE HAS BEEN DEVELOPED WITHIN THE PIPE.
Inventors
- 👤 Harry C Ledebur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:51
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2846
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |