US2748598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable leak tester
Assignee: Whittington Pump & Engineering
•
Filing: 1954-07-01
•
Granted: 1956-06-05
•
Expires: 1974-07-01
Abstract
No abstract record available.
Inventors
- 👤 Lorance E Sterns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:31
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1652051A
Cited
GB277871A
Cited
US1933322A
Cited
GB391218A
Cited
US2383936A
Cited
US2457401A
Cited
US2593957A
Cited
US2620656A
Cited
US2658386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |