US2881314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Null detector
Assignee: Westinghouse Electric Corp
•
Filing: 1956-07-16
•
Granted: 1959-04-07
•
Expires: 1976-07-16
Abstract
No abstract record available.
Inventors
- 👤 Henri H Hoge
- 👤 James E Holthaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:37
CPC Classifications
G; G05; G05B; G05B1/00; G05B1/01; G05B1/02; G05B1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2072278A
Cited
US2454807A
Cited
US2710368A
Cited
US2751555A
Cited
US2781478A
Cited
US2780724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |