Patent US2477646A successfully refreshed from Google Patents.
US2477646A
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US
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Light intensity regulation
Assignee: Individual
•
Filing: 1945-05-03
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Granted: 1949-08-02
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Expires: 1965-05-03
Abstract
No abstract record available.
Inventors
- 👤 Gilbert J Perlow
- 👤 Glenn A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:52
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/04; H05B39/08; H05B39/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1107438A
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US1958986A
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US2043671A
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US2012821A
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US2158193A
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US2269324A
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US2319287A
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US2242638A
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US2356195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |