Patent US2900634A successfully refreshed from Google Patents.
US2900634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex operation using alternately keyed distributed amplifiers
Assignee: INSTR FOR INDUSTRY Inc
•
Filing: 1957-10-09
•
Granted: 1959-08-18
•
Expires: 1977-10-09
Abstract
No abstract record available.
Inventors
- 👤 Lawrence I Algase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:43
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/08; H03F1/18; H03F1/20; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H04B1/56
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |