US2437872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase modulator
Assignee: Mullard Radio Valve Co Ltd
•
Filing: 1944-09-14
•
Granted: 1948-03-16
•
Expires: 1964-09-14
Abstract
No abstract record available.
Inventors
- 👤 Christopher E G Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:24
CPC Classifications
H; H03; H03C; H03C3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2070647A
Cited
US2160465A
Cited
US2105849A
Cited
US2273161A
Cited
US2338395A
Cited
US2297926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |