Patent US2519764A successfully refreshed from Google Patents.
US2519764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of maleic acid
Assignee: EIDP Inc
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Filing: 1945-07-09
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Granted: 1950-08-22
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Expires: 1965-07-09
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:32
CPC Classifications
C; C08; C08F; C08F8/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31616; Y10T428/3162; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3528; Y10T442/3594
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
A PROCESS WHICH COMPRISES ESTERIFYING A COPOLYMER OF MALEIC ANHYDRIDE AND AT LEAST ONE POLYMERIZABLE MONOVINYL COMPOUND, WHEREIN THE RATION OF MALEIC GROUPS TO VINYL GROUPS, IS APPROXIMATELY 1 TO 1, WITH AN ALKENOL OF 3-4 CARBON ATOMS, HAVING THE ETHYLENIC GROUP REMOVED FROM THE HYDROXYL GROUP BY ONE CARBON ATOM, AND A STRAIGHT CHAIN NORMAL ALKANOL OF 6-8 CARBON ATOMS, THE RATION OF ALKENOL TO ALKANOL BEING FROM 1/1 TO 1/3.
Claim 2
Dependent Claim
72 words
A PROCESS WHICH COMPRISES ESTERIFYING A COPOLYMER OF MALEIC ANHYDRIDE AND AT LEAST ONE POLYMERIZABLE MONOVINYL COMPOUND, WHEREIN THE RATION OF MALEIC GROUPS TO VINYL GROUPS, IS APPROXIMATELY 1 TO 1, WITH AN ALKENOL OF 3-4 CARBON ATOMS, HAVING THE ETHYLENIC GROUP REMOVED FROM THE HYDROXYL GROUP BY ONE CARBON ATOM, AND A STRAIGHT CHAIN NORMAL ALKANOL OF 6-8 CARBON ATOMS, THE RATION OF ALKENOL TO ALKANOL BEING FROM 1/1 TO 1/3.
Claim 3
Dependent Claim
103 words
A LAMINATED ARTICLE COMPRISING A PLURALITY OF LAYERS OF FABRIC FROM THE GROUP CONSISTING OF GLASS FABRIC AND RAYON FABRIC, BONDED TOGETHER BY MEANS OF A RESINOUS ESTER PREPARED BY REACTING A COPOLYMER OF MALEIC ANYHYDRIDE AND AT LEAST ONE POLYMERIZABLE MONOVINYL COMPOUND, WHEREIN THE RATION OF MALEIC GROUPS TO VINYL GROUPS IS APPROXIMATELY 1 TO 1, WITH AN ALKENOL OF 3 TO 4 CARBON ATOMS HAVING TH ETHYLENIC GROUP REMOVED FROM THE HYDROXYL GROUP BY ONE CARBON ATOM, AND WITH A STRAIGHT CHAIN NORMAL ALKANOL OF 6 TO 8 CARBON ATOMS, THE RATIO OF ALKENOL TO ALKANOL BEING FROM 1/1 TO 1/3.
Claim 4
Dependent Claim
103 words
A LAMINATED ARTICLE COMPRISING A PLURALITY OF LAYERS OF FABRIC FROM THE GROUP CONSISTING OF GLASS FABRIC AND RAYON FABRIC, BONDED TOGETHER BY MEANS OF A RESINOUS ESTER PREPARED BY REACTING A COPOLYMER OF MALEIC ANYHYDRIDE AND AT LEAST ONE POLYMERIZABLE MONOVINYL COMPOUND, WHEREIN THE RATION OF MALEIC GROUPS TO VINYL GROUPS IS APPROXIMATELY 1 TO 1, WITH AN ALKENOL OF 3 TO 4 CARBON ATOMS HAVING TH ETHYLENIC GROUP REMOVED FROM THE HYDROXYL GROUP BY ONE CARBON ATOM, AND WITH A STRAIGHT CHAIN NORMAL ALKANOL OF 6 TO 8 CARBON ATOMS, THE RATIO OF ALKENOL TO ALKANOL BEING FROM 1/1 TO 1/3.
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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) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |