US2477074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide band amplifier coupling circuits
Assignee: Individual
•
Filing: 1948-12-22
•
Granted: 1949-07-26
•
Expires: 1968-12-22
Abstract
No abstract record available.
Inventors
- 👤 Frank H Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:10
CPC Classifications
H; H01; H01F; H01F19/00; H01F19/04; H01F19/06; H03; H03F; H03F3/00; H03F3/20; H03F3/22; H03F3/26; H03F3/28; H03F3/50; H03F3/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1791236A
Cited
US2187782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |