US2830407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower using slugs of granular material to cut deposits from heating surfaces
Assignee: Babcock and Wilcox Co
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Filing: 1955-05-16
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Granted: 1958-04-15
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Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Hardgrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:45
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0092; B24C7/0046; F; F28; F28G; F28G1/00; F28G1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1454979A
Cited
DE628434C
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US2477334A
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US2497021A
Cited
GB636052A
Cited
US2569952A
Cited
FR1088479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |