US2431333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric wave amplifier
Assignee: International Standard Electric Corp
•
Filing: 1943-05-31
•
Granted: 1947-11-25
•
Expires: 1963-05-31
Abstract
No abstract record available.
Inventors
- 👤 Labin Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:40
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/08; H03F1/14; H03F1/16; H03C; H03C1/00; H03C1/16; H03C1/18; H03C1/22; H03F3/00; H03F3/50; H03F3/52; H03F3/54
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) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |