US2449685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio receiver or amplifier arranged to be fed from direct current mains
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-05-09
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Granted: 1948-09-21
•
Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Bouman Johannes Augus Josephus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:54
CPC Classifications
H; H02; H02H; H02H11/00; H02H11/002; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607; H04B1/1623
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB551234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |