Patent US2528130A successfully refreshed from Google Patents.
US2528130A
Expired / Lapsed
US
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Device for blowing air into a room
Assignee: Svenska Flaktfabriken AB
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Filing: 1947-03-28
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Granted: 1950-10-31
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Expires: 1967-03-28
Abstract
No abstract record available.
Inventors
- 👤 Frisk Nils Pontus Wilhelm
- 👤 Wallin Sven Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:05
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075; F24F13/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB263953A
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US1886313A
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US1872007A
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GB377634A
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US2104279A
Cited
US2106458A
Cited
US2339629A
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US2337280A
Cited
US2396025A
Cited
US2366264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |