US2996465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin cured butyl composition and article
Assignee: Bridgestone Firestone Inc
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Filing: 1959-02-13
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Granted: 1961-08-15
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Expires: 1979-02-13
Abstract
No abstract record available.
Inventors
- 👤 Warren E Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:22
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD OF CHEMICALLY MODIFYING A RUBBERY COPOLYMER OF AN ISOOLEFIN HAVING FROM 4 TO 7 CARBON ATOMS WITH FROM .5 TO 10% OF AN ALIPHATIC CONJUGATED DIOLEFIN HAVING FROM 4 TO 6 CARBON ATOMS COMPRISING HEATING 100 PARTS BY WEIGHT OF SAID COPOLYMER AT A TEMPERATURE OF FROM 200* TO 400* F. FOR FROM 5 MINUTES TO 3 HOURS IN ADMIXTURE WITH A 2,6-DIMETHYLOL-4-HYDROCARBON PHENOL AND AT LEAST 3 PARTS OF A CONIFEROUS SOFTENER.
Claim 2
Independent Claim
75 words
A METHOD OF CHEMICALLY MODIFYING A RUBBERY COPOLYMER OF AN ISOOLEFIN HAVING FROM 4 TO 7 CARBON ATOMS WITH FROM .5 TO 10% OF AN ALIPHATIC CONJUGATED DIOLEFIN HAVING FROM 4 TO 6 CARBON ATOMS COMPRISING HEATING 100 PARTS BY WEIGHT OF SAID COPOLYMER AT A TEMPERATURE OF FROM 200* TO 400* F. FOR FROM 5 MINUTES TO 3 HOURS IN ADMIXTURE WITH A 2,6-DIMETHYLOL-4-HYDROCARBON PHENOL AND AT LEAST 3 PARTS OF A CONIFEROUS SOFTENER.
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |