US2596945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of 1-alkenyl nitriles and allylic esters of aromatic dicarboxylic acids
Assignee: Shell Development Co
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Filing: 1947-03-24
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Granted: 1952-05-13
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Expires: 1967-03-24
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
- 👤 Carl W Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:54
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08; C08F20/00; C08F20/02; C08F20/42; C08F20/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A COPOLYMER COMPRISING THE PRODUCT OBTAINED BY COMPLETELY POLYMERIZING A MIXTURE CONTAINING AS ITS SOLE POLYMERIZABLE COMPONENTS DIALLYL PHTHALATE AND METHACRYLONITRILE WHEREIN THE AMOUNT OF DIALLYL PHTHALATE IN THE MIXTURE IS BETWEEN 5% AND 45% BY WEIGHT OF THE METHACRYLONITRILE.
Claim 2
Dependent Claim
40 words
A COPOLYMER COMPRISING THE PRODUCT OBTAINED BY COMPLETELY POLYMERIZING A MIXTURE CONTAINING AS ITS SOLE POLYMERIZABLE COMPONENTS DIALLYL PHTHALATE AND METHACRYLONITRILE WHEREIN THE AMOUNT OF DIALLYL PHTHALATE IN THE MIXTURE IS BETWEEN 5% AND 45% BY WEIGHT OF THE METHACRYLONITRILE.
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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |