US2441749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically energized visible unit
Assignee: Individual
•
Filing: 1944-08-07
•
Granted: 1948-05-18
•
Expires: 1964-08-07
Abstract
No abstract record available.
Inventors
- 👤 Carl M Brainard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:12
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/39
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1690279A
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US1041210A
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GB214754A
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US1654068A
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US1908191A
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US2146818A
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US1961749A
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US2173234A
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GB435025A
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US2339178A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |