US3304255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for continuous removal of contaminants from lubricating oil and apparatus therefor
Assignee: Mitsubishi Heavy Industries Ltd
•
Filing: 1964-10-21
•
Granted: 1967-02-14
•
Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Katsuta Kihei
- 👤 Nakagawa Akito
- 👤 Mitsutake Hideto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:18
CPC Classifications
C; C10; C10G; C10G19/00; C10M; C10M175/00; C10M175/0016; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD FOR CONTINUOUS REMOVAL OF DETERIORATED AND CONTAMINATIVE COMPONENTS OF LUBRICATING OIL WHICH COMPRISES CONTINUOUSLY ADDING TO THE LUBRICATING OIL AN AQUEOUS SOLUTION OF LESS THAN ABOUT 20% OF CAUSTIC ALKALI, THEREBY TO INCREASE THE PARTICLE SIZE OF THE DETERIORATED AND CONTAMINATIVE COMPONENTS IN THE OIL BY COHESION, THE ALKALI BEING ADDED IN AN AMOUNT OF 0.1 TO 1.5 KG. PER TON OF OIL, AND THEREAFTER SEPARATING AND REMOVING THE THUSLY ENLARGED DETERIORATED AND CONTAMINATIVE COMPONENTS.
Claim 2
Independent Claim
77 words
A METHOD FOR CONTINUOUS REMOVAL OF DETERIORATED AND CONTAMINATIVE COMPONENTS OF LUBRICATING OIL WHICH COMPRISES CONTINUOUSLY ADDING TO THE LUBRICATING OIL AN AQUEOUS SOLUTION OF LESS THAN ABOUT 20% OF CAUSTIC ALKALI, THEREBY TO INCREASE THE PARTICLE SIZE OF THE DETERIORATED AND CONTAMINATIVE COMPONENTS IN THE OIL BY COHESION, THE ALKALI BEING ADDED IN AN AMOUNT OF 0.1 TO 1.5 KG. PER TON OF OIL, AND THEREAFTER SEPARATING AND REMOVING THE THUSLY ENLARGED DETERIORATED AND CONTAMINATIVE COMPONENTS.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |