US2672601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fault indicating apparatus
Assignee: FERRANT Ltd
•
Filing: 1952-02-27
•
Granted: 1954-03-16
•
Expires: 1972-02-27
Abstract
No abstract record available.
Inventors
- 👤 Welby Brian Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:43
CPC Classifications
G; G06; G06K; G06K5/00; G06K5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US561431A
Cited
US687948A
Cited
US1914481A
Cited
US1784504A
Cited
US2293708A
Cited
US2389204A
Cited
US2369678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |