US2666852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable frequency multivibrator
Assignee: Individual
•
Filing: 1946-04-02
•
Granted: 1954-01-19
•
Expires: 1966-04-02
Abstract
No abstract record available.
Inventors
- 👤 Lowell M Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:01
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/05; H03K3/06; H03K3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1979484A
Cited
US1934322A
Cited
US2452549A
Cited
US2402989A
Cited
US2441579A
Cited
US2389992A
Cited
US2413932A
Cited
US2409229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |