US1999884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency multiplication
Assignee: RCA Corp
•
Filing: 1930-12-26
•
Granted: 1935-04-30
•
Expires: 1950-12-26
Abstract
No abstract record available.
Inventors
- 👤 Salzberg Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:03
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; F16D3/64; F16D3/66; H; H01; H01J; H01J31/00; H01J31/02; H01J31/04; H01J31/06; H03; H03B; H03B13/00; H03B19/00; H03B19/06; H03B19/08; H03B19/10
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) | 1938-04-29 | 1938-10-29 | 1939-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-29 | 1942-10-29 | 1943-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-29 | 1946-10-29 | 1947-04-30 | $7700.00 | Window Closed / Lapsed |