Patent US2444908A successfully refreshed from Google Patents.
US2444908A
Expired / Lapsed
US
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Fluid heat exchange installation
Assignee: Babcock and Wilcox Co
•
Filing: 1946-06-06
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Granted: 1948-07-13
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Expires: 1966-06-06
Abstract
No abstract record available.
Inventors
- 👤 Ervin G Bailey
- 👤 Ralph M Hardgrove
- 👤 Thomas B Stillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:46
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F22; F22D; F22D1/00; F22D1/02; F22D1/08; F22D1/10; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/405; Y10S165/414
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) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |