Patent US4029375A successfully refreshed from Google Patents.
Patent US2201323A successfully refreshed from Google Patents.
US2201323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic modulator and method of modulation
Assignee: RCA Corp
•
Filing: 1936-04-06
•
Granted: 1940-05-21
•
Expires: 1956-04-06
Abstract
No abstract record available.
Inventors
- 👤 Shelby Robert Evart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:35
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/34; H01; H01J; H01J31/00; H01J31/02; H01J31/04; H03B; H03B13/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-05-21 | 1943-11-20 | 1944-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-21 | 1947-11-20 | 1948-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-21 | 1951-11-20 | 1952-05-21 | $7700.00 | Window Closed / Lapsed |