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US2997132A
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Method for the ventilating of plants for the manufacture of aluminium or similar products
Assignee: Svenska Flaktfabriken AB
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Filing: 1957-03-21
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Granted: 1961-08-22
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Allander Claes
- 👤 Angby Sodra
- 👤 Dock Nils
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
B; B08; B08B; B08B15/00; F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/065; F24F8/00; F24F8/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US14139A
Cited
US1552316A
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US1967940A
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US2057579A
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US2612966A
Cited
US2725117A
Cited
US2730195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |