Patent US3523074A successfully refreshed from Google Patents.
US3523074A
Expired / Lapsed
US
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Novel lubricating oil system and oil filter for internal combustion engines
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-12-16
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Granted: 1970-08-04
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Expires: 1988-12-16
Abstract
No abstract record available.
Inventors
- 👤 Jerome Geyer
- 👤 Shih-En Hu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:25
CPC Classifications
C; C10; C10M; C10M175/00; C10M175/0091; F; F01; F01M; F01M1/00; F01M1/10; F01M2001/1007; F01M2001/1014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |