Patent US2957854A successfully refreshed from Google Patents.
US2957854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-soluble copolymers of vinylpyridine and mixtures of dissimilar alkyl acrylate
Assignee: Shell USA Inc
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Filing: 1958-01-31
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Granted: 1960-10-25
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Expires: 1978-01-31
Abstract
No abstract record available.
Inventors
- 👤 Lorensen Lyman Edward
- 👤 Zachar John
- 👤 Robert C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:01
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN OIL-SOLUBLE COPOLYMER POSSESSING DETERGENT, POUR POINT AND VISCOSITY TEMPERATURE IMPROVING PROPERTIES, WHICH IS A COPOLYMER OF THE THREE GROUPS OF POLYMERIZABLE MONOMERS: (1) A VINYLPYRIDINE, (2) A MIXTURE OF AT LEAST TWO ESTERS OF AN ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND ALPHA-SUBSTITUTED ACRYLIC ACIDS AND LONG CHAIN ALIPHATIC ALCOHOL CONTAINING AT LEAST 10 CARBON ATOMS, ONE OF SAID ESTERS BEING AN ESTER OF ONE OF THE AFOREDESCRIBED ACIDS AND A LONG CHAIN ALIPHATIC ALCOHOL CONTAINING AT LEAST 10, BUT LESS THAN 16 CARBON ATOMS, AND ANOTHER ESTER BEING AN ESTER OF ONE OF THE AFOREDESCRIBED ACIDS
Claim 2
Dependent Claim
100 words
AN OIL-SOLUBLE COPOLYMER POSSESSING DETERGENT, POUR POINT AND VISCOSITY TEMPERATURE IMPROVING PROPERTIES, WHICH IS A COPOLYMER OF THE THREE GROUPS OF POLYMERIZABLE MONOMERS: (1) A VINYLPYRIDINE, (2) A MIXTURE OF AT LEAST TWO ESTERS OF AN ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND ALPHA-SUBSTITUTED ACRYLIC ACIDS AND LONG CHAIN ALIPHATIC ALCOHOL CONTAINING AT LEAST 10 CARBON ATOMS, ONE OF SAID ESTERS BEING AN ESTER OF ONE OF THE AFOREDESCRIBED ACIDS AND A LONG CHAIN ALIPHATIC ALCOHOL CONTAINING AT LEAST 10, BUT LESS THAN 16 CARBON ATOMS, AND ANOTHER ESTER BEING AN ESTER OF ONE OF THE AFOREDESCRIBED ACIDS
References Cited (Backward Citations)
US2828221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |