US3491203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature stabilized amplifier
Assignee: Sonotone Corp
•
Filing: 1966-10-18
•
Granted: 1970-01-20
•
Expires: 1986-10-18
Abstract
No abstract record available.
Inventors
- 👤 Zygmund Shabad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:37
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/181; H03F3/183; H03F1/00; H03F1/30; H03F1/302; H04; H04R; H04R25/00; H04R25/60; H04R25/609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2915600A
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US2975260A
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US3209083A
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US3373368A
Cited
US3243511A
Cited
US3197576A
Cited
US3320365A
Cited
US3382321A
Cited
US3317671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |