US2537692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas burner with variable port size
Assignee: Individual
•
Filing: 1947-07-11
•
Granted: 1951-01-09
•
Expires: 1967-07-11
Abstract
No abstract record available.
Inventors
- 👤 Ervin H Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:43
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE14987C
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US449776A
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US1024261A
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FR664022A
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US1923393A
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DE613846C
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FR790434A
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FR814213A
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US2385413A
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US2470713A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |