US3396575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing tool and method
Assignee: Hydro Test Inc
•
Filing: 1968-01-30
•
Granted: 1968-08-13
•
Expires: 1988-01-30
Abstract
No abstract record available.
Inventors
- 👤 Robert E Sjoberg
- 👤 Anthony S Girala
- 👤 Paul V Ryan
- 👤 Donald L Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2853; E; E21; E21B; E21B47/00; E21B47/10; E21B47/117
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2841007A
Cited
US2953919A
Cited
US2998721A
Cited
US3165918A
Cited
US3165919A
Cited
US3333459A
Cited
US3354697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |