Patent US2598490A successfully refreshed from Google Patents.
US2598490A
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Control of the steam generation in electric steam boilers
Assignee: DeLaval International AB
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Filing: 1947-08-06
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Granted: 1952-05-27
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Expires: 1967-08-06
Abstract
No abstract record available.
Inventors
- 👤 Berg Gosta Valdemar
- 👤 Hallman Nils Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:38
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/28; F22B1/30; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7809; Y10T137/7812; Y10T137/7818; Y10T137/7819; Y10T137/7822; Y10T137/7823; Y10T137/7825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1223729A
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US1665793A
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US1504928A
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US1473243A
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US1597362A
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US1941020A
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US2185786A
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US2453210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |