US2062749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner control apparatus
Assignee: RAILWAY UTILITY Co
•
Filing: 1933-07-03
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Granted: 1936-12-01
•
Expires: 1953-07-03
Abstract
No abstract record available.
Inventors
- 👤 William G Hartwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:08
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/60; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86509; Y10T137/86517; Y10T137/86533; Y10T137/86928; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-12-01 | 1940-06-01 | 1940-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-12-01 | 1944-06-01 | 1944-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-12-01 | 1948-06-01 | 1948-12-01 | $7700.00 | Window Closed / Lapsed |