US3702782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of ethylene/maleic anhydride statistical copolymers with polyamines
Assignee: Ethylene-Plastique
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Filing: 1970-05-19
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Granted: 1972-11-14
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Expires: 1990-05-19
Abstract
Abstract A METHOD OF MODIFYING THE PHYSICAL AND CHEMICAL PROPERITIES OF ETHYLENE/MALEIC ANHYDRIDE STATISTICAL COPOLYMERS BY TREATING THEM WITH A POLYAMINE. THE POLYAMINE DIFFUES INTO THE POLYMER AND REACTS WITH GROUPS DERVIED FROM THE MALEIC ANHYDRIDE, THEREBY PARTIALLY OR TOTALLY CROSS-LINKING THE COPOLYMER. SHAPED ARTICLES OF THE COPOLYMER MAY BE SO TREATED TO MODIFY THEIR SURFACE PROPERTIES AND IF THEY ARE LESS THAN ABOUT 1 CM. THICK, TO MODIFY THEIR BULK PROPERTIES. THE TREATED COPOLYMERS HAVE GOOD HEAT RESISTANCE AND ELECTRICAL INSULATING PROPERTIES.
Inventors
- 👤 Jean-Pierre Barozier
- 👤 Adrien Nicco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:48
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |