Patent US4214443A successfully refreshed from Google Patents.
US2874375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric signaling and indicating apparatus
Assignee: Bendix Aviation Corp
•
Filing: 1953-12-01
•
Granted: 1959-02-17
•
Expires: 1973-12-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry Gandy Elwell
- 👤 Machlanski Sigmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:13
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/57; G01; G01F; G01F15/00; G01F15/07; G01F15/075
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1448402A
Cited
US1637039A
Cited
GB454012A
Cited
US2420539A
Cited
US2538158A
Cited
US2590946A
Cited
US2672600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |