Patent US2429022A successfully refreshed from Google Patents.
US2429022A
Expired / Lapsed
US
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Gas burner with superimposed baffle
Assignee: Individual
•
Filing: 1943-11-29
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Granted: 1947-10-14
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Expires: 1963-11-29
Abstract
No abstract record available.
Inventors
- 👤 Groetchen Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:44
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1379538A
Cited
US1797102A
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FR754561A
Cited
US2040147A
Cited
US2052067A
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US2070111A
Cited
US2219787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |