US2233915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phonographic apparatus
Assignee: RCA Corp
•
Filing: 1939-02-28
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Granted: 1941-03-04
•
Expires: 1959-02-28
Abstract
No abstract record available.
Inventors
- 👤 Edward C Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:36
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/2025; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18648; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19805
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) | 1944-03-03 | 1944-09-02 | 1945-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-03 | 1948-09-02 | 1949-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-03 | 1952-09-02 | 1953-03-04 | $7700.00 | Window Closed / Lapsed |