Patent US5180368A successfully refreshed from Google Patents.
US2616627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counter circuit
Assignee: AT&T Inc
•
Filing: 1948-10-06
•
Granted: 1952-11-04
•
Expires: 1968-10-06
Abstract
No abstract record available.
Inventors
- 👤 William H T Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:56
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/82
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2308778A
Cited
US2405096A
Cited
US2408086A
Cited
US2373134A
Cited
US2462275A
Cited
US2428990A
Cited
US2402372A
Cited
US2421005A
Cited
US2404106A
Cited
US2442428A
Cited
US2516146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |