US3031664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarisation screen and filter for radio waves
Assignee: Marconis Wireless Telegraph Co Ltd
•
Filing: 1959-11-12
•
Granted: 1962-04-24
•
Expires: 1979-11-12
Abstract
No abstract record available.
Inventors
- 👤 Wielobob Mieczyslaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02; H01Q15/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2054896A
Cited
US2298272A
Cited
US2402622A
Cited
US2835890A
Cited
US2726389A
Cited
US2760192A
Cited
FR1120672A
Cited
US2820965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |