Patent US2678030A successfully refreshed from Google Patents.
US2678030A
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US
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Dual fuel constant speed control
Assignee: Nordberg Manufacturing Co
•
Filing: 1949-02-21
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Granted: 1954-05-11
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Expires: 1969-02-21
Abstract
No abstract record available.
Inventors
- 👤 Gerald L Bader
- 👤 George J Wohanka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:21
CPC Classifications
F; F02; F02D; F02D19/00; F02D19/06; F02D19/0602; F02D19/0607; F02D19/0623; F02D19/0663; F02D19/0673; F02D19/0681; F02D19/08; F02D19/10; F02D19/105; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1833265A
Cited
US1858824A
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GB537024A
Cited
US2400219A
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US2400247A
Cited
US2489405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |