Patent US1447020A successfully refreshed from Google Patents.
US1919743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature controlled furnace fan
Assignee: ROAN Manufacturing Co
•
Filing: 1931-08-29
•
Granted: 1933-07-25
•
Expires: 1951-08-29
Abstract
No abstract record available.
Inventors
- 👤 Samuel E Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2064; Y; Y10; Y10S; Y10S236/00; Y10S236/09
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1936-07-24 | 1937-01-23 | 1937-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-24 | 1941-01-23 | 1941-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-24 | 1945-01-23 | 1945-07-25 | $7700.00 | Window Closed / Lapsed |