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Patent US2841360A successfully refreshed from Google Patents.
US2841360A
Expired / Lapsed
US
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Valve for fume channels
Assignee: Svenska Flaktfabriken AB
•
Filing: 1955-06-07
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Granted: 1958-07-01
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Expires: 1975-06-07
Abstract
No abstract record available.
Inventors
- 👤 Gustavsson Stig
- 👤 Ydring Max
- 👤 Nylander Lars Rune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:44
CPC Classifications
F; F23; F23J; F23J11/00; F23L; F23L13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US106867A
Cited
US934188A
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US956357A
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US1588752A
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US1710585A
Cited
US2151296A
Cited
US2577210A
Cited
FR1063200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |