US3028844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control systems
Assignee: Babcock and Wilcox Co
•
Filing: 1952-11-26
•
Granted: 1962-04-10
•
Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 Durham Edwin
- 👤 Harry E Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:45
CPC Classifications
F; F22; F22G; F22G5/00; F22G5/04; F22G5/06; F22G5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2252367A
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GB504114A
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GB523871A
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GB525906A
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US2298700A
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US2550683A
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US2526898A
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US2572253A
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US2590712A
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FR979248A
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US2649079A
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US2579027A
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US2737930A
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US2730080A
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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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |