US2906729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for color improvement of polymeric pour point depressors
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-08-31
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Granted: 1959-09-29
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Expires: 1973-08-31
Abstract
No abstract record available.
Inventors
- 👤 Alexander H Popkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:19
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08F; C08F22/00; C08F22/10; C08F22/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR THE IMPROVEMENT OF THE COLOR AND ODOR OF LUBRICATING OIL ADDITIVES WHICH ARE COPOLYMERS OF (A) ALPHA-BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID NETURAL ESTERS OF SATURATED MONOHYDRIC ALCOHOLS WITH (B) LOW MOLECULAR WEIGHT NEUTRAL VINYL ESTERS, WHEREIN SAID COPOLYMERS HAS BEEN COPOLYMERIZED IN THE PRESENCE OF A STRONG ACID AND A PEROXIDE CATALYST WHICH COMPRISES, CONTACTING SAID COPOLYMES WITH A MINOR BUT COLOR STABILIZING AMOUNT WITHIN THE RANGE OF 0.1 TO 5.0 WT. PERCENT, BASED ON THE WEIGHT OF SAID COPOLYMERS OF A BASIC NITROGEN-CONTAINING NEUTRALIZING AGENT SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND AMINES.
Claim 2
Dependent Claim
98 words
A PROCESS FOR THE IMPROVEMENT OF THE COLOR AND ODOR OF LUBRICATING OIL ADDITIVES WHICH ARE COPOLYMERS OF (A) ALPHA-BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID NETURAL ESTERS OF SATURATED MONOHYDRIC ALCOHOLS WITH (B) LOW MOLECULAR WEIGHT NEUTRAL VINYL ESTERS, WHEREIN SAID COPOLYMERS HAS BEEN COPOLYMERIZED IN THE PRESENCE OF A STRONG ACID AND A PEROXIDE CATALYST WHICH COMPRISES, CONTACTING SAID COPOLYMES WITH A MINOR BUT COLOR STABILIZING AMOUNT WITHIN THE RANGE OF 0.1 TO 5.0 WT. PERCENT, BASED ON THE WEIGHT OF SAID COPOLYMERS OF A BASIC NITROGEN-CONTAINING NEUTRALIZING AGENT SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND AMINES.
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) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |