US2822320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reclaiming used lubricating oil
Assignee: Phillips Petroleum Co
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Filing: 1956-09-28
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Granted: 1958-02-04
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Expires: 1976-09-28
Abstract
No abstract record available.
Inventors
- 👤 Mitacek Bill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:11
CPC Classifications
C; C10; C10M; C10M175/00; C10M175/0016
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
A PROCESS FOR REMOVING IMPURITIES FROM USED LUBRICATING OIL WHICH COMPRISES INTIMATELY ADMIXING HYDRAZINE WITH SAID OIL; AND RECOVERING ADMIXING HYDRAZINE PRODUCT OF THE PROCESS.
Claim 2
Dependent Claim
25 words
A PROCESS FOR REMOVING IMPURITIES FROM USED LUBRICATING OIL WHICH COMPRISES INTIMATELY ADMIXING HYDRAZINE WITH SAID OIL; AND RECOVERING ADMIXING HYDRAZINE PRODUCT OF THE PROCESS.
Claim 3
Dependent Claim
69 words
A PROCESS FOR REMOVING DISPERSED IMPURITIES FROM USED LUBRICATING OIL WHICH COMPRISES INTIMATELY ADMIXING HYDRAZINE WITH SAID OIL IN AN AMOUNT OF 0.5 TO 5 VOLUME PERCENT OF SAID OIL; SEPARATING RESULTING PRECIPITATE THEREFROM, WASHING THE RESULTING OIL WITH WATER, CONTACTING THE WATER-WASHED OIL WITH A SUFFICIENT AMOUNT OF CLAY TO IMPROVE THE COLOR OF THE OIL; AND RECOVERING A PURIFIED OIL THEREFROM AS THE PRODUCT OF THE PROCESS.
Claim 4
Dependent Claim
69 words
A PROCESS FOR REMOVING DISPERSED IMPURITIES FROM USED LUBRICATING OIL WHICH COMPRISES INTIMATELY ADMIXING HYDRAZINE WITH SAID OIL IN AN AMOUNT OF 0.5 TO 5 VOLUME PERCENT OF SAID OIL; SEPARATING RESULTING PRECIPITATE THEREFROM, WASHING THE RESULTING OIL WITH WATER, CONTACTING THE WATER-WASHED OIL WITH A SUFFICIENT AMOUNT OF CLAY TO IMPROVE THE COLOR OF THE OIL; AND RECOVERING A PURIFIED OIL THEREFROM AS THE PRODUCT OF THE PROCESS.
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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |