Patent US2997131A successfully refreshed from Google Patents.
US2997131A
Expired / Lapsed
US
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Moisture separator
Assignee: Stewart Warner Corp
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Filing: 1957-09-04
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Granted: 1961-08-22
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Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 John T Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:30
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12; B01D45/00; B01D45/04; B01D45/06; B01D45/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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CH11343A
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GB190410471A
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FR531515A
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US1544950A
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US1926262A
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US1946744A
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US2146071A
Cited
US2222828A
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US2134544A
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US2302807A
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US2413769A
Cited
US2629459A
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US2801707A
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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 |