Patent US2725367A successfully refreshed from Google Patents.
US2725367A
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Salts of terpolymers of maleic anhydride, diisobutylene and divinylbenzene
Assignee: Rohm and Haas Co
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Filing: 1953-01-29
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Granted: 1955-11-29
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Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 Warren D Niederhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:04
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
AS A NEW COMPOSITION OF MATTER, A SALT OF A TERPOLYMER OF (A) 2 TO 3 MOLAR EQUIVALENTS OF MALEIC ANHYDRIDE, (B) 3 TO 2 MOLAR EQUIVALENTS OF DIISOBUTYLENE AND (C) 0.3% TO 5% DIVINYLBENZENE, BASED ON THE WEIGHT OF SAID MALEIC ANHYDRIDE AND DIISOBUTYLENE.
Claim 2
Dependent Claim
45 words
AS A NEW COMPOSITION OF MATTER, A SALT OF A TERPOLYMER OF (A) 2 TO 3 MOLAR EQUIVALENTS OF MALEIC ANHYDRIDE, (B) 3 TO 2 MOLAR EQUIVALENTS OF DIISOBUTYLENE AND (C) 0.3% TO 5% DIVINYLBENZENE, BASED ON THE WEIGHT OF SAID MALEIC ANHYDRIDE AND DIISOBUTYLENE.
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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |