Patent US3021824A successfully refreshed from Google Patents.
US3021824A
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Forced flow steam generating plant
Assignee: Sulzer AG
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Filing: 1957-11-12
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Granted: 1962-02-20
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Expires: 1977-11-12
Abstract
No abstract record available.
Inventors
- 👤 Profos Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:10
CPC Classifications
F; F01; F01K; F01K21/00; F01K21/06; F01K7/00; F01K7/16; F01K7/22; F01K7/24; F22; F22B; F22B35/00; F22B35/06; F22B35/10; F22B35/102; F22D; F22D11/00; F22D11/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE515097A
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DE735589C
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GB532944A
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US2621637A
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GB693330A
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US2741228A
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GB719753A
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GB747888A
Cited
US2844004A
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US2900792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |