Patent US2991271A successfully refreshed from Google Patents.
US2991271A
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Reaction products of a sulfur chloride and nu, nu'-dialkyl-phenylenediamines as rubber antiozonants
Assignee: Bridgestone Firestone Inc
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Filing: 1959-09-16
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Granted: 1961-07-04
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Expires: 1979-09-16
Abstract
No abstract record available.
Inventors
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:21
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/3725; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
63 words
PROCESS OF MAKING A RUBBERY PRODUCT RESISTANT TO OZONE COMPRISING VULCANIZING A RUBBERY CONJUGATED DIENE POLYMER ADMIXED WITH A RELATIVELY SMALL AMOUNT OF A NEUTRALIZED REACTION PRODUCT OF A SULFUR CHLORIDE AND N,N''-DIALKYL-PHENYLENEDIAMINE, IN WHICH EACH ALKYL GROUP CONTAINS 1 TO 12 CARBON ATOMS, AND THE POSITION OF THE AMINE GROUPS IS SELECTED FROM THE CLASS CONSISTING OF THE ORTHO AND PARA POSITIONS.
Claim 2
Dependent Claim
63 words
PROCESS OF MAKING A RUBBERY PRODUCT RESISTANT TO OZONE COMPRISING VULCANIZING A RUBBERY CONJUGATED DIENE POLYMER ADMIXED WITH A RELATIVELY SMALL AMOUNT OF A NEUTRALIZED REACTION PRODUCT OF A SULFUR CHLORIDE AND N,N''-DIALKYL-PHENYLENEDIAMINE, IN WHICH EACH ALKYL GROUP CONTAINS 1 TO 12 CARBON ATOMS, AND THE POSITION OF THE AMINE GROUPS IS SELECTED FROM THE CLASS CONSISTING OF THE ORTHO AND PARA POSITIONS.
Claim 3
Dependent Claim
11 words
A VULCANIZED RUBBERY PRODUCT PRODUCED BY THE PROCESS OF CLAIM 1.
References Cited (Backward Citations)
US2187155A
Cited
US2867604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |