US2579001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic switching device
Assignee: Individual
•
Filing: 1947-05-26
•
Granted: 1951-12-18
•
Expires: 1967-05-26
Abstract
No abstract record available.
Inventors
- 👤 Charles L Jeffers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0817; H04B7/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2004126A
Cited
US1960350A
Cited
US2179265A
Cited
US2399695A
Cited
US2432422A
Cited
US2418284A
Cited
US2391532A
Cited
US2434822A
Cited
US2473457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |