US2760642A
Expired / Lapsed
US
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Assignee: ENGINE LIFE PRODUCTS Corp
•
Filing: 1954-04-19
•
Granted: 1956-08-28
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Expires: 1974-04-19
Abstract
No abstract record available.
Inventors
- 👤 James E Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:41
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D2201/00; B01D2201/30; B01D2201/301; B01D2201/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US483172A
Cited
US2320725A
Cited
US2310405A
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US2621889A
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US2605901A
Cited
US2569186A
Cited
GB678934A
Cited
GB697816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |