US3268830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operational amplifier gain control circuit utilizing non-linear devices
Assignee: Individual
•
Filing: 1963-08-13
•
Granted: 1966-08-23
•
Expires: 1983-08-13
Abstract
No abstract record available.
Inventors
- 👤 Sam P Ragsdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:55
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3094675A
Cited
US3058068A
Cited
AT218578B
Cited
US3153152A
Cited
US3167718A
Cited
US3166720A
Cited
US3210690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |