US2628198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl maleate-vinyl acetate copolymers
Assignee: Standard Oil Development Co
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Filing: 1951-03-31
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Granted: 1953-02-10
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Expires: 1971-03-31
Abstract
No abstract record available.
Inventors
- 👤 Arundale Erving
- 👤 Fred W Banes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:56
CPC Classifications
C; C10; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/16; C08; C08F; C08F222/00; C08F222/10; C08F222/12; C08F222/14; C08F222/145; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A LUBRICATING COMPOSITION CONSISTING OF MINERAL BASE LUBRICATING OIL OF A VISCOSITY OF 35 TO 800 S. S. U. AT 210* F. AND 0.01 TO 20% OF A C3 TO C20 ALKYL MALEATE VINYL ACETATE COPOLYMER HAVING AN AVERAGE MOLECULAR WEIGHT OF 7,000 TO 25,000, AND HAVING A MAXIMUM MOLECULAR WEIGHT OF NOT MORE THAN 40,000, SAID POLYMER BEING POLYMERIZED IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AND FROM ABOUT 0.1% TO 5.0% BY WEIGHT OF A PEROXIDE CATALYST, AT A TEMPERATURE OF FROM ABOUT 30* TO 60* C., SAID COPOLYMERIZATION BEING PROMOTED BY ABOUT 0.01 TO 5% BY WEIGHT OF A FERRIC SALT OF A LONG CHAIN FATTY ACID AS AN OXIDIZING AGENT AND ABOUT 0.1 TO 5.0% OF AN OIL SOLUBLE ORGANIC REDUCING AGENT SELECTED FROM THE CLASS CONSISTING OF BENZOIN, ACETAL, DIACETONE ALCOHOL, DIACETYL ACETONE AND ACETONYL ACETONE AS A REDUCTIONOXIDATION AGENT ACTIVATOR COMBINATION.
Claim 2
Dependent Claim
148 words
A LUBRICATING COMPOSITION CONSISTING OF MINERAL BASE LUBRICATING OIL OF A VISCOSITY OF 35 TO 800 S. S. U. AT 210* F. AND 0.01 TO 20% OF A C3 TO C20 ALKYL MALEATE VINYL ACETATE COPOLYMER HAVING AN AVERAGE MOLECULAR WEIGHT OF 7,000 TO 25,000, AND HAVING A MAXIMUM MOLECULAR WEIGHT OF NOT MORE THAN 40,000, SAID POLYMER BEING POLYMERIZED IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AND FROM ABOUT 0.1% TO 5.0% BY WEIGHT OF A PEROXIDE CATALYST, AT A TEMPERATURE OF FROM ABOUT 30* TO 60* C., SAID COPOLYMERIZATION BEING PROMOTED BY ABOUT 0.01 TO 5% BY WEIGHT OF A FERRIC SALT OF A LONG CHAIN FATTY ACID AS AN OXIDIZING AGENT AND ABOUT 0.1 TO 5.0% OF AN OIL SOLUBLE ORGANIC REDUCING AGENT SELECTED FROM THE CLASS CONSISTING OF BENZOIN, ACETAL, DIACETONE ALCOHOL, DIACETYL ACETONE AND ACETONYL ACETONE AS A REDUCTIONOXIDATION AGENT ACTIVATOR COMBINATION.
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) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |