US2582603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for neutralization of frequency divider chains
Assignee: Individual
•
Filing: 1946-01-05
•
Granted: 1952-01-15
•
Expires: 1966-01-05
Abstract
No abstract record available.
Inventors
- 👤 John K Phelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:36
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/12; H03K; H03K23/00; H03K23/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |