US2822787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for removing the internal tube deposits in a oncethrough forced circulation vapor generator
Assignee: Babcock and Wilcox Co
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Filing: 1954-04-07
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Granted: 1958-02-11
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Expires: 1974-04-07
Abstract
No abstract record available.
Inventors
- 👤 Gauger Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:53
CPC Classifications
F; F28; F28G; F28G9/00; F22; F22B; F22B29/00; F22B29/06; F22B29/08; F22B37/00; F22B37/02; F22B37/48; F22B37/486; Y; Y10; Y10S; Y10S122/00; Y10S122/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |