US2566420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic relay system
Assignee: GREAT AMERICAN IND Inc
•
Filing: 1947-04-23
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Granted: 1951-09-04
•
Expires: 1967-04-23
Abstract
No abstract record available.
Inventors
- 👤 Keinath George
- 👤 Reinhard K Hellmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
G; G01; G01R; G01R17/00; G01R17/02; G01R17/04; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2321605A
Cited
US2452023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |