Patent US2965358A successfully refreshed from Google Patents.
US2965358A
Expired / Lapsed
US
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Air heater seal
Assignee: Babcock and Wilcox Co
•
Filing: 1957-09-03
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Granted: 1960-12-20
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Expires: 1977-09-03
Abstract
No abstract record available.
Inventors
- 👤 Behrens Alfred
- 👤 Jaekel Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:20
CPC Classifications
F; F16; F16J; F16J15/00; F28; F28F; F28F9/00; F28F9/001; F28F9/02; F28F9/26; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1734962A
Cited
US1634821A
Cited
US1804191A
Cited
FR814069A
Cited
GB526124A
Cited
US2460746A
Cited
US2578783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |