US2551137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam generator unit
Assignee: Kennedy Van Saun Manufacturing and Engineering Corp
•
Filing: 1945-03-03
•
Granted: 1951-05-01
•
Expires: 1965-03-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:01
CPC Classifications
F; F22; F22B; F22B21/00; F22B21/34; F22B21/348
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1296233A
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US1132225A
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US1764172A
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DE454408C
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US1851842A
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US2003419A
Cited
FR773477A
Cited
US2139348A
Cited
US2325583A
Cited
US2418815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |