US2477039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transceiver circuit arrangement
Assignee: Hartford National Bank and Trust Co
•
Filing: 1947-02-07
•
Granted: 1949-07-26
•
Expires: 1967-02-07
Abstract
No abstract record available.
Inventors
- 👤 Braak Dirk Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:06
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H03; H03J; H03J7/00; H03J7/02; H03J7/023; H04B1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2114036A
Cited
US2206695A
Cited
GB551472A
Cited
US2317547A
Cited
US2408826A
Cited
US2425013A
Cited
US2379395A
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 |