Patent US3052623A successfully refreshed from Google Patents.
US3052623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dewaxing of lube oils and deoiling of waxes
Assignee: ExxonMobil Oil Corp
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Filing: 1960-04-29
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Granted: 1962-09-04
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Expires: 1980-04-29
Abstract
No abstract record available.
Inventors
- 👤 Roy T Edwards
- 👤 Robert F Westall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:46
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE IMPROVE METHOD OF DEWAXING MINERAL OILS AND DEOILING WHICH COMPRISES ADDING TO A WAXY MINERAL OIL BETWEEN ABOUT 0.0005-1.00% BY WEIGHT OF A POLYMERIC VINYL ESTER FORMED FROM A MIXTURE OF 70% VINYL STERATE AND 30% VINYL PALMITATE IN WHICH THE MOLECULAR WEIGHT OF THE COPOLYMER IS BETWEEN ABOUT 5,000 TO 90,000 DISSOLVING THE MIXTURE IN A SUITABLE SOLVENT, CHILLING THE MIXTURE AND FILTERING THE MIXTURE.
Claim 2
Dependent Claim
67 words
THE IMPROVE METHOD OF DEWAXING MINERAL OILS AND DEOILING WHICH COMPRISES ADDING TO A WAXY MINERAL OIL BETWEEN ABOUT 0.0005-1.00% BY WEIGHT OF A POLYMERIC VINYL ESTER FORMED FROM A MIXTURE OF 70% VINYL STERATE AND 30% VINYL PALMITATE IN WHICH THE MOLECULAR WEIGHT OF THE COPOLYMER IS BETWEEN ABOUT 5,000 TO 90,000 DISSOLVING THE MIXTURE IN A SUITABLE SOLVENT, CHILLING THE MIXTURE AND FILTERING THE MIXTURE.
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) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |