US2561355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric signal device
Assignee: Edwards & Co Inc
•
Filing: 1947-05-20
•
Granted: 1951-07-24
•
Expires: 1967-05-20
Abstract
No abstract record available.
Inventors
- 👤 George R Fish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:27
CPC Classifications
G; G10; G10K; G10K1/00; G10K1/06; G10K1/062; G10K1/063; G10K1/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR754314A
Cited
US1048913A
Cited
US1213610A
Cited
GB144964A
Cited
US1815853A
Cited
US1839342A
Cited
US2228677A
Cited
US2357743A
Cited
US2459510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |