Patent US3040170A successfully refreshed from Google Patents.
US3040170A
Expired / Lapsed
US
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Plug-in fluorescent light ballast
Assignee: Individual
•
Filing: 1959-03-10
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Granted: 1962-06-19
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Expires: 1979-03-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Chwan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:16
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/08; H01F38/10; F; F21; F21V; F21V23/00; F21V23/02; H05; H05B; H05B41/00; H05B41/02; F21Y; F21Y2103/00; Y; Y10; Y10S; Y10S174/00; Y10S174/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1694715A
Cited
US2564273A
Cited
US2597060A
Cited
US2574019A
Cited
US2702378A
Cited
US2836805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |