Patent US3017870A successfully refreshed from Google Patents.
US3017870A
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Steam or vapor generator having at least two firing systems
Assignee: Sulzer AG
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Filing: 1959-03-12
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Granted: 1962-01-23
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Expires: 1979-03-12
Abstract
No abstract record available.
Inventors
- 👤 Profos Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:21
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; F; F01; F01K; F01K3/00; F01K3/18; F01K3/24; F01K7/00; F01K7/16; F01K7/22; F22; F22B; F22B31/00; F22B31/04; F22B35/00; F22B35/06; F22B35/10; F22B35/108; F22G; F22G5/00; F22G5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2781746A
Cited
US2752899A
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US2872907A
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US2901887A
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US2856906A
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US2896592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |