US2883694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soot blower
Assignee: Blaw Knox Co
•
Filing: 1955-06-13
•
Granted: 1959-04-28
•
Expires: 1975-06-13
Abstract
No abstract record available.
Inventors
- 👤 Jr De Los E Hibner
- 👤 James W Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:27
CPC Classifications
F; F28; F28G; F28G3/00; F28G3/16; F28G3/166; F28G15/00; F28G15/04; F28G15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US867511A
Cited
US2126683A
Cited
US2324785A
Cited
US2441112A
Cited
GB636052A
Cited
FR1026751A
Cited
US2760222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |