US2236004A
Expired / Lapsed
US
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Ultra high frequency signaling system
Assignee: RCA Corp
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Filing: 1938-07-30
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Granted: 1941-03-25
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Expires: 1958-07-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Maclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:21
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/04; H01F21/005; H01P; H01P7/00; H01P7/04; H03; H03D; H03D9/00; H03D9/06; H03D9/065; H03F; H03F3/00; H03F3/54; H03H; H03H5/00; H03H5/02; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/1018
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) | 1944-03-24 | 1944-09-23 | 1945-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-24 | 1948-09-23 | 1949-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-24 | 1952-09-23 | 1953-03-25 | $7700.00 | Window Closed / Lapsed |