US2569186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: ENGINE LIFE PRODUCTS Corp
•
Filing: 1949-04-04
•
Granted: 1951-09-25
•
Expires: 1969-04-04
Abstract
No abstract record available.
Inventors
- 👤 Frank R Ogilvie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:18
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/114; B01D29/88; B01D29/90; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1802557A
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US1871810A
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US2454030A
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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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |