US2999383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic tracer method for determining lubricant in engine exhaust
Assignee: Ford Motor Co
•
Filing: 1960-06-02
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Granted: 1961-09-12
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Expires: 1980-06-02
Abstract
No abstract record available.
Inventors
- 👤 Ford R Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:57
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1729732A
Cited
US2664779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |