Patent US3392155A successfully refreshed from Google Patents.
US3392155A
Expired / Lapsed
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Low molecular weight maleic compound copolymers partially esterified with monohydric polyether alcohols
Assignee: Sinclair Research Inc
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Filing: 1966-08-19
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Granted: 1968-07-09
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Expires: 1986-08-19
Abstract
No abstract record available.
Inventors
- 👤 Irving E Muskat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:19
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/04; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A MONOVINYL AROMATIC COMPOUND-MALEIC COMPOUND COPOLYMER HAVING A MOLAR RATIO OF POLYMERIZED VINYL COMPOUND TO POLYMERIZED MALEIC COMPOUND OF ABOUT 1:1 TO 5:1, CONTAINING AT LEAST TWO MALEIC GROUPS PER POLYMER MOLECULE AND ABOUT 5 TO 75% OF THE CARBOXY CARBON ATOMS OF THE COPOLYMER BEING ESTERIFIED WTH A MONOHYDROXY POLYOXYALKYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 120 TO 10,000 AND CORRESPONDING TO THE GENERAL FORMULA:
Claim 2
Dependent Claim
67 words
A MONOVINYL AROMATIC COMPOUND-MALEIC COMPOUND COPOLYMER HAVING A MOLAR RATIO OF POLYMERIZED VINYL COMPOUND TO POLYMERIZED MALEIC COMPOUND OF ABOUT 1:1 TO 5:1, CONTAINING AT LEAST TWO MALEIC GROUPS PER POLYMER MOLECULE AND ABOUT 5 TO 75% OF THE CARBOXY CARBON ATOMS OF THE COPOLYMER BEING ESTERIFIED WTH A MONOHYDROXY POLYOXYALKYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 120 TO 10,000 AND CORRESPONDING TO THE GENERAL FORMULA:
References Cited (Backward Citations)
US3207718A
Cited
BE621179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |