Patent US2738314A successfully refreshed from Google Patents.
US2738314A
Expired / Lapsed
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Treatment of lubricating oil with adsorbent clay
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-05-21
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Granted: 1956-03-13
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Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Charles J Lewis
- 👤 James R Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:58
CPC Classifications
C; C10; C10G; C10G25/00; C10G71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD FOR IMPROVING THE COLOR OF A LUBRICATING OIL FRACTION WHICH COMPRISES CONTACTING THE LUBRICATING OIL FRACTION WITH AN ADSORBENT CLAY AT A TEMPERATURE WITHIN THE RANGE OF 300 TO 500* F. IN THE PRESENCE OF A MIXTURE OF APPROXIMATELY EQUAL AMOUNTS WITHIN THE RANGE OF .14% TO .28% OF ALKALI METAL SALTS OF NAPHTHENIC AND SULFONIC ACIDS.
Claim 2
Independent Claim
59 words
A METHOD FOR IMPROVING THE COLOR OF A LUBRICATING OIL FRACTION WHICH COMPRISES CONTACTING THE LUBRICATING OIL FRACTION WITH AN ADSORBENT CLAY AT A TEMPERATURE WITHIN THE RANGE OF 300 TO 500* F. IN THE PRESENCE OF A MIXTURE OF APPROXIMATELY EQUAL AMOUNTS WITHIN THE RANGE OF .14% TO .28% OF ALKALI METAL SALTS OF NAPHTHENIC AND SULFONIC ACIDS.
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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |