Patent US2489303A successfully refreshed from Google Patents.
US2489303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counter frequency divider without time delay
Assignee: Individual
•
Filing: 1942-04-06
•
Granted: 1949-11-29
•
Expires: 1962-04-06
Abstract
No abstract record available.
Inventors
- 👤 Lifschutz Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:28
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/12; H03K; H03K23/00; H03K23/82; H03K3/00; H03K3/02; H03K3/04; H03K3/05; H03K3/06; H03K3/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1733614A
Cited
US1979484A
Cited
US2022969A
Cited
US2158285A
Cited
US2266668A
Cited
US2212173A
Cited
US2212420A
Cited
US2275016A
Cited
US2404918A
Cited
US2305625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |