Patent US3053814A successfully refreshed from Google Patents.
US3053814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imides of isobutylene/maleic anhydride interpolymers
Assignee: Monsanto Chemicals Ltd
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Filing: 1960-02-15
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Granted: 1962-09-11
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Expires: 1980-02-15
Abstract
No abstract record available.
Inventors
- 👤 Ross M Hedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:36
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
AN IMIDE COMPOSITION COMPRISING SUBSTANTIALLY A 1:1 MOLAR INTERPOLYMER OF ISOBUTYLENE AND MALEIC ANHYDRIDE HAVING A MOLECULAR WEIGHT IN EXCESS OF ABOUT 10, 000, SAID INTERPOLYMER HAVING AT LEAST SUFFICIENT OF THE ANHYDRIDE GROUPS CONVERTED TO IMIDE GROUPS TO MAKE THE COMPOSITION WATER-INSOLUBLE AND SUBSTANTIALLY ALL THE BALANCE OF THE ANHYDRIDE GROUPS CONVERTED TO AMIDE AND AMMONIUM SALT GROUPS.
Claim 2
Dependent Claim
59 words
AN IMIDE COMPOSITION COMPRISING SUBSTANTIALLY A 1:1 MOLAR INTERPOLYMER OF ISOBUTYLENE AND MALEIC ANHYDRIDE HAVING A MOLECULAR WEIGHT IN EXCESS OF ABOUT 10, 000, SAID INTERPOLYMER HAVING AT LEAST SUFFICIENT OF THE ANHYDRIDE GROUPS CONVERTED TO IMIDE GROUPS TO MAKE THE COMPOSITION WATER-INSOLUBLE AND SUBSTANTIALLY ALL THE BALANCE OF THE ANHYDRIDE GROUPS CONVERTED TO AMIDE AND AMMONIUM SALT GROUPS.
References Cited (Backward Citations)
US2921928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |