US2644930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave polarization rotating device and coupling network
Assignee: General Precision Laboratory Inc
•
Filing: 1949-03-24
•
Granted: 1953-07-07
•
Expires: 1969-03-24
Abstract
No abstract record available.
Inventors
- 👤 Charles H Luhrs
- 👤 William J Tull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:33
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/165; H01P1/175
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2197123A
Cited
US2402948A
Cited
US2438119A
Cited
US2425345A
Cited
US2442396A
Cited
US2532157A
Cited
US2508479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |