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US3438247A
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US
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Hydraulic leak testing system and apparatus
Assignee: STELLAR ENG Inc
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Filing: 1967-06-19
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Granted: 1969-04-15
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Expires: 1987-06-19
Abstract
No abstract record available.
Inventors
- 👤 Louis B Lotti
- 👤 Donald W Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:29
CPC Classifications
G; G01; G01M; G01M3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US909950A
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US2472973A
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US2961868A
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US3092821A
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US3246507A
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US3360982A
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US3353402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |