Patent US2642414A successfully refreshed from Google Patents.
US2642414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of maleic esters and long chain alkyl methacrylates
Assignee: Rohm and Haas Co
•
Filing: 1950-02-03
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Granted: 1953-06-16
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Expires: 1970-02-03
Abstract
No abstract record available.
Inventors
- 👤 La Verne N Bauer
- 👤 Harry T Neher
- 👤 William L Van Horne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:21
CPC Classifications
C; C08; C08F; C08F222/00; C08F222/10; C08F222/12; C08F222/14; C08F222/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A COPOLYMER OF AN ESTER (A) OF METHACRYLIC ACID AND A SATURATED MONOHYDRIC ALIPHATIC ALCOHOL, ROH, IN WHICH R IS AN ALKYL GROUP HAVING A CHAIN OF 16 TO 18 CARBON ATOMS, AND AN ESTER (B) OF AT LEAST ONE SATURATED MONOHYDRIC ALIPHATIC ALCOHOL, R''OH, IN WHICH R'' IS AN ALKYL GROUP OF 4 TO 14 CARBON ATOMS, AND A MALEIC-TYPE ACID, HOOCC(X)=CHCOOH, IN WHICH X IS A MEMBER OF THE CLASS CONSISTING OF HYDROGEN, CHLORINE, AND THE METHYL GROUP, THE PROPORTION OF ESTER (A) GROUPS TO ESTER (B) GROUPS IN THE COPOLYMER BEING WITHIN THE FOLLOWING RATIOS, 1:X AND 1:Y, THE VALUE OF X BEING DETERMINED BY THE EQUATION 0.7N-X=0.3 AND THE VALUE OF Y BEING DETERMINED BY THE EQUATION 0.022N-Y=0.013, N REPRESENTING THE NUMBER OF CARBON ATOMS IN THE LONGEST STRAIGHT CHAIN OF R''.
Claim 2
Dependent Claim
136 words
A COPOLYMER OF AN ESTER (A) OF METHACRYLIC ACID AND A SATURATED MONOHYDRIC ALIPHATIC ALCOHOL, ROH, IN WHICH R IS AN ALKYL GROUP HAVING A CHAIN OF 16 TO 18 CARBON ATOMS, AND AN ESTER (B) OF AT LEAST ONE SATURATED MONOHYDRIC ALIPHATIC ALCOHOL, R''OH, IN WHICH R'' IS AN ALKYL GROUP OF 4 TO 14 CARBON ATOMS, AND A MALEIC-TYPE ACID, HOOCC(X)=CHCOOH, IN WHICH X IS A MEMBER OF THE CLASS CONSISTING OF HYDROGEN, CHLORINE, AND THE METHYL GROUP, THE PROPORTION OF ESTER (A) GROUPS TO ESTER (B) GROUPS IN THE COPOLYMER BEING WITHIN THE FOLLOWING RATIOS, 1:X AND 1:Y, THE VALUE OF X BEING DETERMINED BY THE EQUATION 0.7N-X=0.3 AND THE VALUE OF Y BEING DETERMINED BY THE EQUATION 0.022N-Y=0.013, N REPRESENTING THE NUMBER OF CARBON ATOMS IN THE LONGEST STRAIGHT CHAIN OF R''.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |