Patent US4023858A successfully refreshed from Google Patents.
Patent US2646028A successfully refreshed from Google Patents.
US2646028A
Expired / Lapsed
US
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Standby hot water heater for buses
Assignee: Vapor Heating Corp
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Filing: 1950-09-29
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Granted: 1953-07-21
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Expires: 1970-09-29
Abstract
No abstract record available.
Inventors
- 👤 Edward A Russell
- 👤 Norman O Kirkby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:52
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB174243A
Cited
GB296043A
Cited
US1783289A
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US1939376A
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US1885225A
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US2078116A
Cited
US2121090A
Cited
US2414214A
Cited
FR900944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |