US2824038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triply rubber laminate and method of making the same
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-04-29
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Granted: 1958-02-18
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Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Howard L Wilson
- 👤 Samuel B Robison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; B; B32; B32B; B32B25/00; C08J2307/00; C08J2309/00; C08J2353/00; C08J2353/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31837
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
THE METHOD OF UNITING A SOLID ISOOLEFIN-DIOLEFIN INTERPOLYMER MATERIAL, PREPARED BY REACTING TOGETHER A MAJOR PROPORTION OF ISOBUTYLENE AND A MINOR PROPORTION OF A CONJUGATED DIOLEFIN HAVING FROM 4 TO 8 CARBON ATOMS, IN THE PRESENCE OF A DISSOVLED FRIEDEL-CRAFTS CATALYST, AT A TEMPERATURE BETWEEN -40*C. AND -160*C., SAID INTERPOLYMER HAVING A WIJS IODINE NUMBER BELOW 10, AND A MOLECULAR WEIGTH GREATER THAN 20,000, TO A HIGH UNSATURATION, RUBBERY MATERIAL HAVING A WIJS IODINE NUMBER BETWEEN THAT OF GR-S SYNTHETIC RUBBER AND 451, WHICH COMPRISES INTERPOSING BETWEEN THE SAID TWO MATERIALS A LAYER COMPRISING A COPOLYMER OF ISOBUTYLENE AND BUTADIENE, SAID COPOLYMER PREPARED FROM AN OLEFINIC FEED MIXTURE HAVING 50 TO 750 PARTS OF BUTADIENE PER 100 PARTS OF ISOBUTYLENE.
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) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |