US2839512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylpyridine long chain acrylic ester copolymers and their preparation
Assignee: Shell Development Co
•
Filing: 1955-12-30
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Granted: 1958-06-17
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Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 Emmett R Barnum
- 👤 Lyman F Lorensen
- 👤 Zachar John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:22
CPC Classifications
C; C10; C10M; C10M149/00; C10M149/02; C10M149/10; C08; C08F; C08F20/00; C08F20/02; C08F20/08; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN OIL-SOLUBLE COPOLYMER OF (1) A MONOVINYL-SUBSTITUTED PRYIDINE OF THE GROUP CONSISTING OF PYRIDINES SUBSTITUTED ON ONE OF THE RING CARBON ATOMS WITH, AS THE SOLE SUBSTITUTED SUBSTITUENT, A VINYL GROUP, AND DERIVATIVES OF THE AFOREDESCRIBED VINYLPRIDINES HAVING A LOWER ALKYL GROUP SUBSTITUTED ON A RING CARBON ATOM AND (2) A MIXTURE OF A C16 TO C20 ALKYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSITING OF ACRYLIC ACID AND METHACRYLIC ACID AND A C10 TO C14 ALKYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID IN MOLE RATIOS VARYING FROM 1:1 TO 1:3, SAID COPOLYMER HAVING THE MONOVINYL PYRIDINE AND THE COMBINED ACRYLIC ACID ESTERS IN A MOLE RATIO VARYING FROM 1:10 TO 5:1 AND A MOLECULAR WEIGHT FROM 5X10**4 TO 2.5X10**6.
Claim 2
Dependent Claim
131 words
AN OIL-SOLUBLE COPOLYMER OF (1) A MONOVINYL-SUBSTITUTED PRYIDINE OF THE GROUP CONSISTING OF PYRIDINES SUBSTITUTED ON ONE OF THE RING CARBON ATOMS WITH, AS THE SOLE SUBSTITUTED SUBSTITUENT, A VINYL GROUP, AND DERIVATIVES OF THE AFOREDESCRIBED VINYLPRIDINES HAVING A LOWER ALKYL GROUP SUBSTITUTED ON A RING CARBON ATOM AND (2) A MIXTURE OF A C16 TO C20 ALKYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSITING OF ACRYLIC ACID AND METHACRYLIC ACID AND A C10 TO C14 ALKYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID IN MOLE RATIOS VARYING FROM 1:1 TO 1:3, SAID COPOLYMER HAVING THE MONOVINYL PYRIDINE AND THE COMBINED ACRYLIC ACID ESTERS IN A MOLE RATIO VARYING FROM 1:10 TO 5:1 AND A MOLECULAR WEIGHT FROM 5X10**4 TO 2.5X10**6.
References Cited (Backward Citations)
US2592107A
Cited
US2737496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |