US1758828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined burner and regulator unit
Assignee: Doherty Research Co
•
Filing: 1924-01-10
•
Granted: 1930-05-13
•
Expires: 1944-01-10
Abstract
No abstract record available.
Inventors
- 👤 James P Fisher
- 👤 Greenfield Benjamin
- 👤 Noble M Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:57
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/20; F23N; F23N1/00; F23N1/02
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) | 1933-05-12 | 1933-11-11 | 1934-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-05-12 | 1937-11-11 | 1938-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-05-12 | 1941-11-11 | 1942-05-13 | $7700.00 | Window Closed / Lapsed |