US3343582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Covulcanizate comprising polyisoprene, ethylene-propylene-diene rubber, and conjointaccelerators
Assignee: Shell USA Inc
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Filing: 1965-01-27
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Granted: 1967-09-26
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Expires: 1985-01-27
Abstract
No abstract record available.
Inventors
- 👤 Glenn R Himes
- 👤 Dean E Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/45; C08K5/46; C08K5/47; C08K5/16; C08K5/29; C08K5/31; C08K5/39; C08K5/40; C08L; C08L23/00; C08L23/02; C08L23/16; C08L9/00; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A BLEND OF AN UNCURED SYNTHETIC HOMOPOLYISOPRENE RUBBER AND AN INTERPOLYMER RUBBER, SAID INTERPOLYMER BEING OF ETHYLENE, AT LEAST ONE ALPHA OLEFIN HAVING THE STRUCTURE R-CH=CH2 WHEREIN R IS A C1-8 ALKYL RADICAL, AND AT LEAST ONE DIENE OF THE GROUP CONSISTING OF A T-METHYLENE-2-NORBORANE, DICLOPENTADIENE, AND AN ALIPHATIC OPEN CHAIN DIOLEFIN CONTAINING 5-22 CARBON ATOMS IN WHICH THE DOUBLE BONDS ARE SEPARATED BY MORE THAN 2 CARBON ATOMS AND IN WHICH AT LEAST ONE DOUBLE BOND IS TERMINALLY LOCATED, THE DIOLEFIN COMPRISING FROM ABOUT 1 TO 40 MOL PERCENT OF THE INTERPOLYMER, SAID INTERPOLYMERS HAVING AN IODINE NUMBER OF FROM 3 TO 60, THE WEIGHT RATIO OF POLYISOPRENE TO INTERPOLYMER BEING BETWEEN ABOUT 80:20 AND 60:40 AND, AS CURE ACCELERATORS THEREFOR A COMBINATION OF:
Claim 2
Dependent Claim
125 words
A BLEND OF AN UNCURED SYNTHETIC HOMOPOLYISOPRENE RUBBER AND AN INTERPOLYMER RUBBER, SAID INTERPOLYMER BEING OF ETHYLENE, AT LEAST ONE ALPHA OLEFIN HAVING THE STRUCTURE R-CH=CH2 WHEREIN R IS A C1-8 ALKYL RADICAL, AND AT LEAST ONE DIENE OF THE GROUP CONSISTING OF A T-METHYLENE-2-NORBORANE, DICLOPENTADIENE, AND AN ALIPHATIC OPEN CHAIN DIOLEFIN CONTAINING 5-22 CARBON ATOMS IN WHICH THE DOUBLE BONDS ARE SEPARATED BY MORE THAN 2 CARBON ATOMS AND IN WHICH AT LEAST ONE DOUBLE BOND IS TERMINALLY LOCATED, THE DIOLEFIN COMPRISING FROM ABOUT 1 TO 40 MOL PERCENT OF THE INTERPOLYMER, SAID INTERPOLYMERS HAVING AN IODINE NUMBER OF FROM 3 TO 60, THE WEIGHT RATIO OF POLYISOPRENE TO INTERPOLYMER BEING BETWEEN ABOUT 80:20 AND 60:40 AND, AS CURE ACCELERATORS THEREFOR A COMBINATION OF:
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |