Patent US3518585A successfully refreshed from Google Patents.
US3518585A
Expired / Lapsed
US
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Voltage controlled a.c. signal attenuator
Assignee: Texas Instruments Inc
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Filing: 1966-12-30
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Granted: 1970-06-30
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Expires: 1986-12-30
Abstract
No abstract record available.
Inventors
- 👤 Donald L Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:06
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052; H03G1/0058; H03G3/00; H03G3/20; H03G3/30; H03G3/3052; H03G3/3057; H03F; H03F2200/00; H03F2200/63
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2971164A
Cited
US3183373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |