US2672190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing valve for spray type oil burners
Assignee: Individual
•
Filing: 1949-08-12
•
Granted: 1954-03-16
•
Expires: 1969-08-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred F Schumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:26
CPC Classifications
F; F23; F23C; F23C7/00; F23C7/008; F23D; F23D11/00; F23D11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US475908A
Cited
US1790927A
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US1062280A
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US1161183A
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US1180183A
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US1567482A
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US1535166A
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US1679830A
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US1673194A
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US1641534A
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US1819343A
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US2000733A
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US2134471A
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US2217975A
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US2219119A
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US2290785A
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US2368178A
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US2485656A
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US2445602A
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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) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |