Patent US3352074A successfully refreshed from Google Patents.
US2867604A
Expired / Lapsed
US
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Antiozidation of rubber
Assignee: Universal Oil Products Co
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Filing: 1955-06-17
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Granted: 1959-01-06
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Expires: 1975-06-17
Abstract
No abstract record available.
Inventors
- 👤 Robert H Rosenwald
- 👤 Joseph A Chenicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF STABILIZING A RUBBERY POLYMER OF A CONJUGATED 1,3-DIENE NORMALLY SUBJECT TO CRACKING BY THE ACTION OF OZONE WHICH COMPRISES INCORPORATING THEREIN, IN CONCENTRATION OF FROM ABOUT 1% TO ABOUT 5% BY WEIGHT TO RETARD THE CRACKING EFFECT OF OZONE ON THE RUBBER, AN N, N''-DI-SEC-ALKYL-P-PHENYLENE DIAMINE IN WHICH EACH OF THE ALKYL GROUPS CONTAINS FROM 8 TO 9 CARBON ATOMS.
Claim 2
Independent Claim
63 words
A METHOD OF STABILIZING A RUBBERY POLYMER OF A CONJUGATED 1,3-DIENE NORMALLY SUBJECT TO CRACKING BY THE ACTION OF OZONE WHICH COMPRISES INCORPORATING THEREIN, IN CONCENTRATION OF FROM ABOUT 1% TO ABOUT 5% BY WEIGHT TO RETARD THE CRACKING EFFECT OF OZONE ON THE RUBBER, AN N, N''-DI-SEC-ALKYL-P-PHENYLENE DIAMINE IN WHICH EACH OF THE ALKYL GROUPS CONTAINS FROM 8 TO 9 CARBON ATOMS.
References Cited (Backward Citations)
US2067686A
Cited
US2692288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |