US2803848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for supporting and sealing retractable soot blowers
Assignee: Diamond Power Specialty Corp
•
Filing: 1953-09-30
•
Granted: 1957-08-27
•
Expires: 1973-09-30
Abstract
No abstract record available.
Inventors
- 👤 Mart Le Roy S De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:05
CPC Classifications
F; F28; F28G; F28G15/00; F28G15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1010028A
Cited
US966051A
Cited
DE567351C
Cited
US1874151A
Cited
US2089710A
Cited
US2477334A
Cited
US2532447A
Cited
US2444211A
Cited
US2545886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |