US3646166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butyl rubber reaction products
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1970-05-27
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Granted: 1972-02-29
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Expires: 1990-05-27
Abstract
Abstract IONIC CROSSLINKIN IS INTRODUCED INTO AN UNCURED BUTYLRUBBER BY HFALOGENATION OF BUTYL RUBBER, DEHYDROHALOGENATION TO FORM CONJUGATED DOUBLE BONDS AND REACTION OF AN ETHYLENICALLY UNSATURATED COMPOUND SUCH AS MALEIC ANHYDRIDE WITH THIS CONJUGATED DOUBLE BOND SYSTEM TO FORM A GRAFT POLYMER. THE GRAFT POLYMER IN THEN REACTED WITH A METALLIC SALT OR AN AMINE TO FORM AN IONIC HYDROCARBON POLYMER USEFUL FOR MOLDED OR EXTRUDED PRODUCTS.
Inventors
- 👤 Nathan H Canter
- 👤 Joseph P Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:08
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/08; C08F255/10
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |