US2670788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel and air mixing unit for burner assemblies
Assignee: MAC MIXER Inc
•
Filing: 1949-10-10
•
Granted: 1954-03-02
•
Expires: 1969-10-10
Abstract
No abstract record available.
Inventors
- 👤 John L Macfarlane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
CPC Classifications
F; F23; F23D; F23D11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB190930005A
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US1170765A
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US1217551A
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US1241135A
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US1428400A
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Cited
US1862673A
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US1909298A
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FR770478A
Cited
US2383641A
Cited
US2393887A
Cited
US2368370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |