Patent US2504073A successfully refreshed from Google Patents.
US2504073A
Expired / Lapsed
US
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Power-driven soot blower
Assignee: VULCAN SOOT BLOWER Corp
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Filing: 1947-04-22
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Granted: 1950-04-11
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Expires: 1967-04-22
Abstract
No abstract record available.
Inventors
- 👤 De Los E Hibner
- 👤 Fred C Arey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:04
CPC Classifications
F; F28; F28G; F28G15/00; F28G15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1535495A
Cited
US1664859A
Cited
US2110535A
Cited
US2126683A
Cited
US2232000A
Cited
US2319682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |