US3495193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable radio frequency attenuator
Assignee: RCA Corp
•
Filing: 1966-10-17
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Granted: 1970-02-10
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Expires: 1986-10-17
Abstract
No abstract record available.
Inventors
- 👤 Leopold A Harwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:56
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/24; H03H7/25; H01; H01F; H01F19/00; H01F19/04; H01F19/06; H01F29/00; H01F29/14; H01F29/143; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0076; H03G3/00; H03G3/20; H03G3/30; H03G3/3052; H03H11/00; H03H11/02; H03H11/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |