US2887624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay recorder
Assignee: International Standard Electric Corp
•
Filing: 1954-09-01
•
Granted: 1959-05-19
•
Expires: 1974-09-01
Abstract
No abstract record available.
Inventors
- 👤 Hertog Martinus Den
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:39
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/001; H04; H04Q; H04Q3/00; H04Q3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US928104A
Cited
US2512639A
Cited
US2424243A
Cited
US2556975A
Cited
US2566426A
Cited
US2618706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |