Patent US3239495A successfully refreshed from Google Patents.
US3239495A
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US
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Tetrapolymer which comprises isobutylene, isoprene, cyclopentadiene and divinylbenzene
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1960-03-09
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Granted: 1966-03-08
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Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Augustus B Small
- 👤 Jr Leon Sherwood Minckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:04
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/18; C09J123/20; C09J123/22; C08; C08F; C08F10/00; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12; C08F236/00; C08F236/02; C08F236/04; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A HOMOGENEOUS TETRAPOLYMER WITH A RELATIVELY HIGH MOLECULAR WEIGHT WHICH COMPRISES IN COMBINATION, PER 100 PARTS OF ISOBUTYLENE, .5 TO 5 PARTS OF ISOPRENE, .1 TO 1 PART OF CYCLOPENTADIENE, AND .1 TO 1 PART OF DIVINYLBENZENE; SAID TETRAPOLYMER BEING CAPABLE OF BEING COMPOUNDED AND CURED TO PROVIDE A VULCANIZATE THEREFROM WITH IMPROVED OZONE RESISTANCE.
Claim 2
Dependent Claim
55 words
A HOMOGENEOUS TETRAPOLYMER WITH A RELATIVELY HIGH MOLECULAR WEIGHT WHICH COMPRISES IN COMBINATION, PER 100 PARTS OF ISOBUTYLENE, .5 TO 5 PARTS OF ISOPRENE, .1 TO 1 PART OF CYCLOPENTADIENE, AND .1 TO 1 PART OF DIVINYLBENZENE; SAID TETRAPOLYMER BEING CAPABLE OF BEING COMPOUNDED AND CURED TO PROVIDE A VULCANIZATE THEREFROM WITH IMPROVED OZONE RESISTANCE.
References Cited (Backward Citations)
US2732154A
Cited
US2739141A
Cited
US2626940A
Cited
US2729626A
Cited
US2781334A
Cited
US3080337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |