Patent US2422280A successfully refreshed from Google Patents.
US2422280A
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US
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Fluorescent illumination
Assignee: Helene Curtis Industries Inc
•
Filing: 1944-07-24
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Granted: 1947-06-17
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Expires: 1964-07-24
Abstract
No abstract record available.
Inventors
- 👤 David W Abernathy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:03
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/40; H05B41/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2178423A
Cited
US1291945A
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US1744370A
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US1930123A
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GB386552A
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US2114842A
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US2298935A
Cited
US2297781A
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US2258354A
Cited
US2286851A
Cited
US2392845A
Cited
US2332770A
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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) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |