Patent US2825923A successfully refreshed from Google Patents.
US2825923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for soot blowers of the puff type
Assignee: Diamond Power Specialty Corp
•
Filing: 1952-02-21
•
Granted: 1958-03-11
•
Expires: 1972-02-21
Abstract
No abstract record available.
Inventors
- 👤 Mart Le Roy S De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:56
CPC Classifications
F; F23; F23J; F23J3/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1991968A
Cited
US2049421A
Cited
US2493656A
Cited
US2553044A
Cited
GB431852A
Cited
US2065144A
Cited
GB504917A
Cited
US2240079A
Cited
US2303152A
Cited
US2327524A
Cited
US2462614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |