US2666753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of vulcanized copolymers of isobutylene
Assignee: Standard Oil Development Co
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Filing: 1950-03-10
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Granted: 1954-01-19
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Expires: 1970-03-10
Abstract
No abstract record available.
Inventors
- 👤 Robert L Zapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:57
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/02; C08K3/06; C08K5/00; C08K5/36; C08K5/37; C08K5/372
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A COMPOSITION OF MATTER COMPRISING 100 PARTS OF A SOLID, RUBBER-LIKE COPOLYMER OF A MAJOR PROPORTION OF A COMBINED ISOBUTYLENE AND A MINOR PROPORTION OF A COMBINED DIOLEFIN HAVING 4 TO 6 CARBON ATOMS PER MOLECULE, CURING AGENTS CONSISTING ONLY OF DISULFIDE CROSS-LINK FORMING CURING COMPOUNDS INCLUDING 0.5 TO 10 PARTS OF SULFUR OF VULCANIZATION AND ABOUT 5 TO 8 PARTS OF AN OXIDIC METAL COMPOUND CONTAINING 2 OXYGEN ATOMS PER METAL ATOM AND HAVING A DECOMPOSITION TEMPERATURE BETWEEN 250 AND 350* C., TO STABILIZE THE COMPOSITION, AFTER VULCANIZATION, AGAINST CURE REVERSION AT HIGH TEMPERATURE.
Claim 2
Dependent Claim
95 words
A COMPOSITION OF MATTER COMPRISING 100 PARTS OF A SOLID, RUBBER-LIKE COPOLYMER OF A MAJOR PROPORTION OF A COMBINED ISOBUTYLENE AND A MINOR PROPORTION OF A COMBINED DIOLEFIN HAVING 4 TO 6 CARBON ATOMS PER MOLECULE, CURING AGENTS CONSISTING ONLY OF DISULFIDE CROSS-LINK FORMING CURING COMPOUNDS INCLUDING 0.5 TO 10 PARTS OF SULFUR OF VULCANIZATION AND ABOUT 5 TO 8 PARTS OF AN OXIDIC METAL COMPOUND CONTAINING 2 OXYGEN ATOMS PER METAL ATOM AND HAVING A DECOMPOSITION TEMPERATURE BETWEEN 250 AND 350* C., TO STABILIZE THE COMPOSITION, AFTER VULCANIZATION, AGAINST CURE REVERSION AT HIGH TEMPERATURE.
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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |