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US2855904A
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US
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Control method applicable to the feeding of boilers with water
Assignee: D'ETUDE DE VEHICULES S E V Ste
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Filing: 1951-12-15
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Granted: 1958-10-14
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Expires: 1971-12-15
Abstract
No abstract record available.
Inventors
- 👤 Schwander Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:55
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/06; F22B35/10; F22G; F22G5/00; F22G5/12; Y; Y10; Y10S; Y10S122/00; Y10S122/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR795764A
Cited
US2246563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |