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 18:06
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
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References Cited (Backward Citations)
US1733614A
Cited
US1979484A
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US2022969A
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US2158285A
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US2266668A
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US2212173A
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US2212420A
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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 |