US2429162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting and operating of fluorescent lamps
Assignee: BOUCHER AND KEISER Co
•
Filing: 1943-01-18
•
Granted: 1947-10-14
•
Expires: 1963-01-18
Abstract
No abstract record available.
Inventors
- 👤 Keiser Russell William
- 👤 Boucher Charles Philippe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:34
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/10; Y; Y10; Y10S; Y10S315/00; Y10S315/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US519849A
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GB434077A
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US2056647A
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US2190010A
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US2266616A
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US2298935A
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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) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |