Patent US3238124A successfully refreshed from Google Patents.
Patent US2091271A successfully refreshed from Google Patents.
US2091271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver
Assignee: RCA Corp
•
Filing: 1933-01-17
•
Granted: 1937-08-31
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Expires: 1953-01-17
Abstract
No abstract record available.
Inventors
- 👤 James W Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/22
Claims Analysis
Total Claims: 0
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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) | 1940-08-30 | 1941-03-01 | 1941-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-30 | 1945-03-01 | 1945-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-30 | 1949-03-01 | 1949-08-31 | $7700.00 | Window Closed / Lapsed |