US2942687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separator for exhaust gases
Assignee: Individual
•
Filing: 1956-11-15
•
Granted: 1960-06-28
•
Expires: 1976-11-15
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Kollander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:15
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/037; F02; F02C; F02C7/00; F01N2290/00; F01N2290/02; F01N2290/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S60/00; Y10S60/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1350880A
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US1848561A
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US800684A
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US1237302A
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US1586980A
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FR645564A
Cited
FR656882A
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US2147670A
Cited
US2140953A
Cited
US2147671A
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US2763982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |