Patent US2402431A successfully refreshed from Google Patents.
Patent US2997032A successfully refreshed from Google Patents.
US2997032A
Expired / Lapsed
US
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Steam power plant
Assignee: Goetaverken AB
•
Filing: 1957-02-18
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Granted: 1961-08-22
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Expires: 1977-02-18
Abstract
No abstract record available.
Inventors
- 👤 Wedel Per Arvid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:17
CPC Classifications
F; F22; F22G; F22G1/00; F22G1/16; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1892; G; G21; G21D; G21D5/00; G21D5/04; G21D5/08; G21D5/10; G21D5/12; G21D5/16; Y; Y02; Y02E; Y02E30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1972052A
Cited
US1860363A
Cited
US1860364A
Cited
US1890468A
Cited
US1972356A
Cited
US2065782A
Cited
US2404792A
Cited
GB679083A
Cited
US2702026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |