Patent US4137203A successfully refreshed from Google Patents.
US4137203A
Expired / Lapsed
US
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Zinc neutralized sulfonated elastomeric polymer
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-11-29
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Granted: 1979-01-30
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Expires: 1997-11-29
Abstract
Abstract {PG,1 This invention relates to an improved elastomeric composition of zinc neutralized sulfonated EPDM terpolymers which are preferentially plasticized with zinc stearate at a minimum critical concentration level of at least 8 parts per hundred by weight based on 100 parts by weight of the zinc neutralized EPDM terpolymer, wherein the compositions have an improved balance of physical and rheological properties. These compositions can be readily processed due to their superior rheological properties on conventional plastic fabrication equipment.
Inventors
- 👤 Henry S Makowski
- 👤 Douglas Brenner
- 👤 Jan Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; Y; Y10; Y10S; Y10S260/00; Y10S260/31
Claims Analysis
Total Claims: 0
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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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |