Patent US2926190A successfully refreshed from Google Patents.
Patent US4299594A successfully refreshed from Google Patents.
US4299594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for utilizing waste lubricating oils
Assignee: Mobil Oil AS
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Filing: 1980-03-17
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Granted: 1981-11-10
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Expires: 2000-03-17
Abstract
Abstract A process is provided wherein waste hydrocarbon oils are blended with resids and visbroken resids thereby eliminating the use of more valuable cutting stock.
Inventors
- 👤 Bruce P. Pelrine
- 👤 Dennis E. Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:01
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
A process for reclaiming waste hydrocarbon oils of lubricating viscosity comprising blending used or waste oil of lubricating viscosity with a suitable resid or visbroken resid until an oil with a viscosity of less than about 43,000 centastokes is obtained.
Claim 2
Dependent Claim
15 words
The process of claim 1 in which the used oil is an automotive engine oil.
Claim 3
Dependent Claim
20 words
The process of claim 1 in which the resultant oil blend has the viscosity required for a heavy fuel oil.
Claim 4
Dependent Claim
18 words
The process of claim 1 in which said used or waste oil is blended with a visbroken resid.
Claim 5
Dependent Claim
15 words
The process of claim 4 where the amount of waste oil blended varies between 2-50%.
Claim 6
Dependent Claim
17 words
The process of claim 5 wherein the resultant blend is suitable for use as a fuel oil.
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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |