US3417549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust filter device
Assignee: BLANCHE E LEOSIS
•
Filing: 1967-08-21
•
Granted: 1968-12-24
•
Expires: 1987-08-21
Abstract
No abstract record available.
Inventors
- 👤 Blanche E Leosis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:29
CPC Classifications
F; F02; F02B; F02B35/00; F02B35/02; F01; F01N; F01N3/00; F01N3/08; F02M; F02M35/00; F02M35/02; F02M35/08; F01N2330/00; F01N2330/08; F01N2370/00; F01N2370/40; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315163A
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US1139084A
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US997442A
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US1221278A
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US2777759A
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US2707960A
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US3000692A
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US3091078A
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US3224171A
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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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |