US2653195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination timing and telephone circuit controlling system
Assignee: ELECTRONIC SECRETARY Inc
•
Filing: 1951-06-04
•
Granted: 1953-09-22
•
Expires: 1971-06-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:39
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/04; H04M1/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2388686A
Cited
US2036420A
Cited
US2053143A
Cited
US2143692A
Cited
US2163419A
Cited
US2230191A
Cited
US2188055A
Cited
US2223207A
Cited
US2533234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |