Patent US3044004A successfully refreshed from Google Patents.
US3044004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency doubling circuit
Assignee: LENKURT ELECTRIC CO Inc
•
Filing: 1959-04-22
•
Granted: 1962-07-10
•
Expires: 1979-04-22
Abstract
No abstract record available.
Inventors
- 👤 Sicard Jean Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:08
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/40; H02M5/42; H02M5/44; H02M5/453; H02M5/458; H03; H03B; H03B19/00; H03B19/06; H03B19/14; H03B19/16; H03B2200/00; H03B2200/006; H03B2200/0082
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |