US2554401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus provided with gas backflow-inducing means adjacent the nozzles
Assignee: Individual
•
Filing: 1946-07-18
•
Granted: 1951-05-22
•
Expires: 1966-07-18
Abstract
No abstract record available.
Inventors
- 👤 Willard L Christensen
- 👤 Arnold H Redding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:51
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/16; F23R3/42; F23R3/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US657228A
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US883236A
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US1158541A
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US1450229A
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US1458378A
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US1603032A
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GB371056A
Cited
US2072731A
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US2247768A
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US2398654A
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US2368179A
Cited
US2417445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |