US2443933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas mixer
Assignee: —
•
Filing: —
•
Granted: 1948-06-22
•
Expires: 1965-06-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:45
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F02; F02M; F02M21/00; F02M21/02; F02M21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US750822A
Cited
US1319782A
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US1201378A
Cited
US1355998A
Cited
US1387565A
Cited
GB182909A
Cited
GB243847A
Cited
FR29831E
Cited
US2117944A
Cited
DE682226C
Cited
US2187010A
Cited
US2248932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |