Patent US2655857A successfully refreshed from Google Patents.
US2655857A
Expired / Lapsed
US
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Air supply grill
Assignee: Svenska Flaktfabriken AB
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Filing: 1949-08-17
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Granted: 1953-10-20
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Expires: 1969-08-17
Abstract
No abstract record available.
Inventors
- 👤 Broberg Georg Karl Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:46
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/02; F24F13/06; F24F13/075; F24F13/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1671107A
Cited
US2031982A
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US2224312A
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US2300574A
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US2339629A
Cited
GB533139A
Cited
US2339855A
Cited
US2525157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |