Patent US2420562A successfully refreshed from Google Patents.
US2420562A
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Device for mixing gas and air
Assignee: RATHBUN JONES ENGINEERING COMP
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Filing: 1945-08-08
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Granted: 1947-05-13
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Expires: 1965-08-08
Abstract
No abstract record available.
Inventors
- 👤 Rathbun Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:16
CPC Classifications
F; F02; F02M; F02M21/00; F02M21/02; F02M21/04; F02M21/047; F02D; F02D19/00; F02D19/06; F02D19/08; F02D19/10; F02D19/105; F02M21/0218; F02M21/023; F02M21/0239; F02M21/042; F02B; F02B43/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |