US3370573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Start-up system for combined circulation steam generator
Assignee: Combustion Engineering Inc
•
Filing: 1966-12-12
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Granted: 1968-02-27
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Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick J Hanzalek
- 👤 Alwin W Ambrose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:28
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/06; F22B35/08; F22B35/083; F01; F01K; F01K3/00; F01K3/18; F01K3/20; F01K3/22; F22B29/00; F22B29/06; F22B29/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3174288A
Cited
US3194218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |