Patent US2670034A successfully refreshed from Google Patents.
US2670034A
Expired / Lapsed
US
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Air compensator for gas burners
Assignee: Individual
•
Filing: 1951-08-02
•
Granted: 1954-02-23
•
Expires: 1971-08-02
Abstract
No abstract record available.
Inventors
- 👤 Harry E Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:09
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/62; F23D14/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US398505A
Cited
GB189413243A
Cited
US781454A
Cited
US836114A
Cited
GB191504126A
Cited
US1731306A
Cited
US2360310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |