US3285846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automated lubricating oil refining
Assignee: Mobil Oil AS
•
Filing: 1963-09-18
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Granted: 1966-11-15
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Expires: 1983-09-18
Abstract
No abstract record available.
Inventors
- 👤 William H King
- 👤 Robert A Trimble
- 👤 William G Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:41
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/36; C; C10; C10G; C10G21/00; C10G21/30; Y; Y10; Y10S; Y10S208/00; Y10S208/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A PROCESS FOR PRODUCING LUBRICATING OIL INCLUDING AN EXTRACTION PROCESS FOR PRODUCING WAXY REAFFINATE WHICH IS DEWAXED TO PROVIDE THE LUBRICATING OIL, THE IMPROVEMENT COMPRISING DETECTING THE SPECIFIC GRAVITY OF SAID WAXY REAFFINATE, AND CONTROLLING AT LEAST ONE PARAMETER OF SAID EXTRACTION PROCESS TO OBTAIN A WAX REAFFINATE OF A PREDETERMINED SPECIFIC GRAVITY WHEREBY SAID EXTRACTION PROCESS IS CONTROLLED IN RESPONSE TO THE SPECIFIC GRAVITY OF THE WAXY REAFFINATE TO CONTROL THE VISCOSITY INDEX OF THE DEWAXED LUBRICATING OIL.
Claim 2
Dependent Claim
80 words
IN A PROCESS FOR PRODUCING LUBRICATING OIL INCLUDING AN EXTRACTION PROCESS FOR PRODUCING WAXY REAFFINATE WHICH IS DEWAXED TO PROVIDE THE LUBRICATING OIL, THE IMPROVEMENT COMPRISING DETECTING THE SPECIFIC GRAVITY OF SAID WAXY REAFFINATE, AND CONTROLLING AT LEAST ONE PARAMETER OF SAID EXTRACTION PROCESS TO OBTAIN A WAX REAFFINATE OF A PREDETERMINED SPECIFIC GRAVITY WHEREBY SAID EXTRACTION PROCESS IS CONTROLLED IN RESPONSE TO THE SPECIFIC GRAVITY OF THE WAXY REAFFINATE TO CONTROL THE VISCOSITY INDEX OF THE DEWAXED LUBRICATING OIL.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |