Patent US2918448A successfully refreshed from Google Patents.
US2918448A
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Vulcanization of butyl rubber with 2,2'-methylene-bis-(4-chloro-6-methylolphenol)
Assignee: Uniroyal Inc
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Filing: 1957-03-11
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Granted: 1959-12-22
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Expires: 1977-03-11
Abstract
No abstract record available.
Inventors
- 👤 Paul Viohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:10
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08L23/26; C08L23/28; C08L23/283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD COMPRISING HEATING 100 PARTS OF A RUBBERY COPOLYMER OF AN ISOOLEFIN HAVING FROM 4 TO 7 CARBON BON ATOMS WITH A DIOLEFIN HAVING FROM 4 TO 8 CARATOMS, THE SAID COPOLYMER CONTAINING FROM 0.5 TO 10% OF SAID DIOLEFIN, IN ADMIXTURE WITH FROM 0.25 TO 15 PARTS OF 2,2''-METHLYENE-BIS-(4-CHLORO-6-METHYLOLPHENOL) AT A TEMPERATURE OF FROM 125* TO 200*C., FOR A PERIOD OF FROM 2 MINUTES TO 8 HOURS.
Claim 2
Independent Claim
69 words
A METHOD COMPRISING HEATING 100 PARTS OF A RUBBERY COPOLYMER OF AN ISOOLEFIN HAVING FROM 4 TO 7 CARBON BON ATOMS WITH A DIOLEFIN HAVING FROM 4 TO 8 CARATOMS, THE SAID COPOLYMER CONTAINING FROM 0.5 TO 10% OF SAID DIOLEFIN, IN ADMIXTURE WITH FROM 0.25 TO 15 PARTS OF 2,2''-METHLYENE-BIS-(4-CHLORO-6-METHYLOLPHENOL) AT A TEMPERATURE OF FROM 125* TO 200*C., FOR A PERIOD OF FROM 2 MINUTES TO 8 HOURS.
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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |