US3352832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of nu-substituted maleimides
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1963-11-12
•
Granted: 1967-11-14
•
Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Barr Dennis Arthur
- 👤 Nield Eric
- 👤 Rose John Brewster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A SUBSTANTIALLY COLORLESS AND SUBSTANTIALLY WATERINSENSITIVE MOLDABLE COPOLYMER CONSISTING ESSENTIALLY OF COPOLYMERIZED UNITS OF: (I) AT LEAST ONE N-ARYL MALEIMIDE WHICH IS N-PHENYL MALEIMIDE OR A DERIVATIVE THEREOF IN WHICH AT LEAST ONE OF THE AROMATICALLY BOUND HYDROGEN ATOMS HAS BEEN SUBSTITUTED BY A HALOGEN ATOM, A NITRO GROUP, A NITRILE GROUP OR AN ALKYL OR ALKOXY GROUP CONTAINING FROM 1 TO 4 CARBON ATOMS, (II) AT LEAST ONE MONOETHYLENICALLY UNSATURATED ALPHAOLEFIN HYDROCARBON CONTAINING NOT MORE THAN EIGHT CARBON ATOMS, AND (III) AT LEAST ONE OTHER COPOLYMERIZABLE MONOMER, AND IN WHICH THE TOTAL AMOUNT OF THE COPOLYMERIZED N-ARYL MALEIMIDE UNITS IS NOT LESS THAN THE TOTAL MOLAR AMOUNT OF THE ALPHA-OLEFIN UNITS, AND THE TOTAL AMOUNT OF THE COPOLYMERIZED UNITS OF THE OTHER COPOLYMERIZABLE MONOMER IS NOT MORE THAN 25 MOLE PERCENT.
Claim 2
Dependent Claim
132 words
A SUBSTANTIALLY COLORLESS AND SUBSTANTIALLY WATERINSENSITIVE MOLDABLE COPOLYMER CONSISTING ESSENTIALLY OF COPOLYMERIZED UNITS OF: (I) AT LEAST ONE N-ARYL MALEIMIDE WHICH IS N-PHENYL MALEIMIDE OR A DERIVATIVE THEREOF IN WHICH AT LEAST ONE OF THE AROMATICALLY BOUND HYDROGEN ATOMS HAS BEEN SUBSTITUTED BY A HALOGEN ATOM, A NITRO GROUP, A NITRILE GROUP OR AN ALKYL OR ALKOXY GROUP CONTAINING FROM 1 TO 4 CARBON ATOMS, (II) AT LEAST ONE MONOETHYLENICALLY UNSATURATED ALPHAOLEFIN HYDROCARBON CONTAINING NOT MORE THAN EIGHT CARBON ATOMS, AND (III) AT LEAST ONE OTHER COPOLYMERIZABLE MONOMER, AND IN WHICH THE TOTAL AMOUNT OF THE COPOLYMERIZED N-ARYL MALEIMIDE UNITS IS NOT LESS THAN THE TOTAL MOLAR AMOUNT OF THE ALPHA-OLEFIN UNITS, AND THE TOTAL AMOUNT OF THE COPOLYMERIZED UNITS OF THE OTHER COPOLYMERIZABLE MONOMER IS NOT MORE THAN 25 MOLE PERCENT.
References Cited (Backward Citations)
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US2313565A
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US2301356A
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US2384239A
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US2698316A
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US2650215A
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US2686774A
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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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |