Patent US3165486A successfully refreshed from Google Patents.
US3165486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked olefin-maleic anhydride interpolymers and salts thereof
Assignee: Monsanto Co
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Filing: 1958-09-29
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Granted: 1965-01-12
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Expires: 1978-09-29
Abstract
No abstract record available.
Inventors
- 👤 John H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:47
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A CROSS-LINKED INTERPOLYMER COMPRISING SUBSTANTIALLY EQUIMOLAR PORTIONS OF MALEIC ANHYDRIDE AND AN OLEFIN HAVING FROM 2 TO 4 CARBON ATOMS, AND A CROSS-LINKING AGENT WHICH IS A VINYL ESTER OF AN OLEFINICALLY UNSATURATED ALIPHATIC CARBOXYLIC ACID HAVING FROM 3 TO 24 CARBON ATOMS IN AN AMOUNT IN THE RANGE OF ABOUT 0.1 MOL PERCENT TO ABOUT 5 MOL PERCENT BASED ON REACTING MONOMERS.
Claim 2
Dependent Claim
63 words
A CROSS-LINKED INTERPOLYMER COMPRISING SUBSTANTIALLY EQUIMOLAR PORTIONS OF MALEIC ANHYDRIDE AND AN OLEFIN HAVING FROM 2 TO 4 CARBON ATOMS, AND A CROSS-LINKING AGENT WHICH IS A VINYL ESTER OF AN OLEFINICALLY UNSATURATED ALIPHATIC CARBOXYLIC ACID HAVING FROM 3 TO 24 CARBON ATOMS IN AN AMOUNT IN THE RANGE OF ABOUT 0.1 MOL PERCENT TO ABOUT 5 MOL PERCENT BASED ON REACTING MONOMERS.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |