US2654727A
Expired / Lapsed
US
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Esters of thiophene-modified maleic anhydride-styrene copolymers
Assignee: ExxonMobil Oil Corp
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Filing: 1951-06-27
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Granted: 1953-10-06
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Expires: 1971-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand P Otto
- 👤 Orland M Reiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:31
CPC Classifications
C; C10; C10M; C10M151/00; C10M151/02; C08; C08F; C08F22/00; C08F22/04; C10M2221/00; C10M2221/02; C10N; C10N2040/00; C10N2040/02; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
AS A NEW COMPOSITION OF MATTER, A REACTION PRODUCT PREPARED BY THE STEPS OF (1) REACTING TOGETHER (A) ABOUT 1 MOLE OF MALEIC ANHYDRIDE, (B) ABOUT 1 MOLE OF STYRENE AND (C) FROM ABOUT 1 TO ABOUT 10 MOLES OF A THIOPHENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOPHENE AND ALKYL-SUBSTITUTED THIOPHENES CONTAINING NO SUBSTITUENT GROUPS OTHER THAN ALKYL GROUPS, AT A TEMPERATURE OF FROM ABOUT 75* C. TO ABOUT 125* C., AND (2) ESTERIFYING THE PRODUCT OBTAINED IN STEP (1) WITH A PRIMARY, NORMAL, SATURATED ALCOHOL HAVING FROM ABOUT 10 TO ABOUT 18 CARBON ATOMS.
Claim 2
Dependent Claim
97 words
AS A NEW COMPOSITION OF MATTER, A REACTION PRODUCT PREPARED BY THE STEPS OF (1) REACTING TOGETHER (A) ABOUT 1 MOLE OF MALEIC ANHYDRIDE, (B) ABOUT 1 MOLE OF STYRENE AND (C) FROM ABOUT 1 TO ABOUT 10 MOLES OF A THIOPHENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF THIOPHENE AND ALKYL-SUBSTITUTED THIOPHENES CONTAINING NO SUBSTITUENT GROUPS OTHER THAN ALKYL GROUPS, AT A TEMPERATURE OF FROM ABOUT 75* C. TO ABOUT 125* C., AND (2) ESTERIFYING THE PRODUCT OBTAINED IN STEP (1) WITH A PRIMARY, NORMAL, SATURATED ALCOHOL HAVING FROM ABOUT 10 TO ABOUT 18 CARBON ATOMS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |