US2697449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accumulator structure
Assignee: Babcock and Wilcox Co
•
Filing: 1948-12-14
•
Granted: 1954-12-21
•
Expires: 1968-12-14
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Svenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:32
CPC Classifications
F; F04; F04B; F04B11/00; F04B11/0008; F04B11/0016; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/10; F15B1/12; F15B1/125; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3151; F15B2201/40; F15B2201/41; F15B2201/415; F15B2201/4155; F15B2201/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US381731A
Cited
FR841468A
Cited
US2241056A
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US2300722A
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US2324701A
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US2345475A
Cited
US2401791A
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US2489491A
Cited
US2563257A
Cited
US2642090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |