US3420508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot gas quencher
Assignee: Babcock and Wilcox Co
•
Filing: 1966-08-15
•
Granted: 1969-01-07
•
Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Hurst
- 👤 Edward P Darlinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:41
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; F28D; F28D21/00; F28D2021/0019; F28D2021/0075; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1272528A
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US2656307A
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SU143371A1
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GB1017715A
Cited
US3279156A
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US3347024A
Cited
US3367402A
Cited
US3315443A
Cited
US3284435A
Cited
US3317197A
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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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |