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Patent US3049984A successfully refreshed from Google Patents.
US3049984A
Expired / Lapsed
US
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Air curtains
Assignee: Svenska Flaktfabriken AB
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Filing: 1959-11-03
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Granted: 1962-08-21
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Expires: 1979-11-03
Abstract
No abstract record available.
Inventors
- 👤 Boysen Arne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:37
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075; F24F13/08; F24F13/10; F24F13/14; F24F13/1406; F24F13/1413; F24F13/1426; F24F13/1486; F24F9/00; F24F2013/1446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |