US3028346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Covulcanizate of chlorinated butyl rubber and highly unsaturated rubber, and processfor preparing same
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1958-09-18
•
Granted: 1962-04-03
•
Expires: 1978-09-18
Abstract
No abstract record available.
Inventors
- 👤 Lemiszka Theodore
- 👤 Delmer L Cottle
- 👤 Jr Leon Sherwood Minckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/26; C08L23/28; C08L23/283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A CO-VULCANIZATE OF EXCELLENT HEAT STABILITY COMPRISING: A MINOR PROPORTION OF A HIGHLY UNSATURATED RUBBER CHOSEN FROM THE GROUP CONSISTING OF 2 TO 16 PARTS BY WEIGHT OF NATURAL RUBBER AND 4 TO 16 PARTS BY WEIGHT OF DIENE-STYRENE COPOLYMERS; SUFFICIENT CHLORINATED BUTYL RUBBER TO GIVE A TOTAL CONCENTRATION OF CHLORINATED BUTYL RUBBER AND SAID HIGHYL UNSATURATED RUBBER OF 100 PARTS BY WEIGHT, SAID CHLORINATED BUTYL RUBBR BEING A COPOLYMER OF 85 TO 99.5 WT. PERCENT OF A C4 TO C7 ISOOLEFIN AND 0.5 TO 15 WT. PERCENT OF A C4 TO C14 MULTIOLEFIN, AND HAVING A MOLE PERCENT UNSATURATION OF ABOUT 0.5 TO 15, SAID CHLORINATED BUTYL RUBBER COPOLYMER CONTAINING AT LEAST 0.5 WT. PERCENT CHLORINE BUT NO MORE THAN ONE ATOM OF CHLORINE PER DOUBLE BOND IN SAID COPOLYMER; SULFUR; A VULCANIZATION ACCELERATOR; AND A BASIC POLYVALENT METAL OXIDE.
Claim 2
Dependent Claim
141 words
A CO-VULCANIZATE OF EXCELLENT HEAT STABILITY COMPRISING: A MINOR PROPORTION OF A HIGHLY UNSATURATED RUBBER CHOSEN FROM THE GROUP CONSISTING OF 2 TO 16 PARTS BY WEIGHT OF NATURAL RUBBER AND 4 TO 16 PARTS BY WEIGHT OF DIENE-STYRENE COPOLYMERS; SUFFICIENT CHLORINATED BUTYL RUBBER TO GIVE A TOTAL CONCENTRATION OF CHLORINATED BUTYL RUBBER AND SAID HIGHYL UNSATURATED RUBBER OF 100 PARTS BY WEIGHT, SAID CHLORINATED BUTYL RUBBR BEING A COPOLYMER OF 85 TO 99.5 WT. PERCENT OF A C4 TO C7 ISOOLEFIN AND 0.5 TO 15 WT. PERCENT OF A C4 TO C14 MULTIOLEFIN, AND HAVING A MOLE PERCENT UNSATURATION OF ABOUT 0.5 TO 15, SAID CHLORINATED BUTYL RUBBER COPOLYMER CONTAINING AT LEAST 0.5 WT. PERCENT CHLORINE BUT NO MORE THAN ONE ATOM OF CHLORINE PER DOUBLE BOND IN SAID COPOLYMER; SULFUR; A VULCANIZATION ACCELERATOR; AND A BASIC POLYVALENT METAL OXIDE.
References Cited (Backward Citations)
US2631984A
Cited
US2732354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |