Patent US782843A successfully refreshed from Google Patents.
Patent US3003113A successfully refreshed from Google Patents.
US3003113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low level differential amplifier
Assignee: Individual
•
Filing: 1958-07-28
•
Granted: 1961-10-03
•
Expires: 1978-07-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward F Macnichol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:01
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2638512A
Cited
US2680160A
Cited
US2854531A
Cited
US2801296A
Cited
US2901556A
Cited
US2789164A
Cited
US2867695A
Cited
US2828450A
Cited
US2873320A
Cited
US2959741A
Cited
US2863957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |