US2877348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logarithmic amplifier
Assignee: Individual
•
Filing: 1954-12-15
•
Granted: 1959-03-10
•
Expires: 1974-12-15
Abstract
No abstract record available.
Inventors
- 👤 Elmer J Wade
- 👤 Richard S Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:15
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2194499A
Cited
US2247085A
Cited
US2557888A
Cited
US2698914A
Cited
US2676268A
Cited
US2728862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |