Patent US2946569A successfully refreshed from Google Patents.
US2946569A
Expired / Lapsed
US
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Apparatus for cleaning the surfaces of heat exchange means
Assignee: Babcock and Wilcox Co
•
Filing: 1954-06-17
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Granted: 1960-07-26
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Expires: 1974-06-17
Abstract
No abstract record available.
Inventors
- 👤 Kirkby Albert Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:33
CPC Classifications
F; F28; F28G; F28G1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2574503A
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US2559876A
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US2665119A
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US2751211A
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US2750158A
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US2762610A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |