US2597423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam generator
Assignee: Combustion Engineering Inc
•
Filing: 1948-12-17
•
Granted: 1952-05-20
•
Expires: 1968-12-17
Abstract
No abstract record available.
Inventors
- 👤 Woynar Basil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:42
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/406; F22; F22B; F22B29/00; F22B29/02; F22B29/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190723213A
Cited
US1976029A
Cited
US1812966A
Cited
US1814605A
Cited
US1960005A
Cited
DE662966C
Cited
US2170349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |