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US2949282A
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Apparatus for cleaning heat exchange means
Assignee: Babcock and Wilcox Co
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Filing: 1955-11-18
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Granted: 1960-08-16
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Expires: 1975-11-18
Abstract
No abstract record available.
Inventors
- 👤 Albert H Kirkby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:51
CPC Classifications
F; F28; F28G; F28G1/00; F28G1/12; C; C10; C10B; C10B43/00; C10B43/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1373750A
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US1802583A
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US2665119A
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US2669810A
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US2565341A
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US2809018A
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GB726744A
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US2762610A
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US2716021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |