US1770805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway signaling system
Assignee: General Electric Co
•
Filing: 1928-08-09
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Granted: 1930-07-15
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Expires: 1948-08-09
Abstract
No abstract record available.
Inventors
- 👤 David C Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:13
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/16; B61L3/18; B61L3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-07-14 | 1934-01-13 | 1934-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-07-14 | 1938-01-13 | 1938-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-07-14 | 1942-01-13 | 1942-07-15 | $7700.00 | Window Closed / Lapsed |