US2797746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for maintaining the correct supply of air for burning a gas of varying composition
Assignee: JAMES G MURRAY JR
•
Filing: 1955-05-12
•
Granted: 1957-07-02
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Expires: 1975-05-12
Abstract
No abstract record available.
Inventors
- 👤 Bourek Rudolf
- 👤 Skozdopole Hans
- 👤 Sr Paul L Wachendorfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:18
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02; F23N1/025; F23N2235/00; F23N2235/02; F23N2235/06; F23N2235/10; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2529; Y10T137/2531
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1527721A
Cited
US2082539A
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US2322374A
Cited
US2352584A
Cited
US2394297A
Cited
FR900696A
Cited
US2570410A
Cited
US2688253A
Cited
US2723559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |