US3024218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu, nu'-dialkyl thioureas as antiozone agents for rubber
Assignee: Bridgestone Firestone Inc
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Filing: 1955-06-15
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Granted: 1962-03-06
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Expires: 1975-06-15
Abstract
No abstract record available.
Inventors
- 👤 Henry P Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/405; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A SULFUR-VULCANIZED RUBBER COMPOSITION WHICH INCLUDES AS AN INHIBITOR OF DETERIORATION A SMALL AMOUNT OF A SYMMETRICAL DISUBSTITUTED THIOUREA IN WHICH THE SUBSTITUENTS ARE FROM THE CLASS CONSISTING OF AKYL, CYCLOALKYL AND ALKENYL GROUPS WHICH CONTAIN UP TO EIGHT CARBON ATOMS, SAID RUBBER BEING FROM THE CLASS CONSISTING OF NATURAL RUBBER, HOMOPOLYMERS OF BUTADIENE AND ALKYL DERIVATIVES THEREOF, COPOLYMERS OF (A) BUTADIENE AND ALKYL DERIVATIVES THEREOF WITH (B) VINYL COMONOMERS, AND MIXTURES OF THE FOREGOING.
Claim 2
Dependent Claim
75 words
A SULFUR-VULCANIZED RUBBER COMPOSITION WHICH INCLUDES AS AN INHIBITOR OF DETERIORATION A SMALL AMOUNT OF A SYMMETRICAL DISUBSTITUTED THIOUREA IN WHICH THE SUBSTITUENTS ARE FROM THE CLASS CONSISTING OF AKYL, CYCLOALKYL AND ALKENYL GROUPS WHICH CONTAIN UP TO EIGHT CARBON ATOMS, SAID RUBBER BEING FROM THE CLASS CONSISTING OF NATURAL RUBBER, HOMOPOLYMERS OF BUTADIENE AND ALKYL DERIVATIVES THEREOF, COPOLYMERS OF (A) BUTADIENE AND ALKYL DERIVATIVES THEREOF WITH (B) VINYL COMONOMERS, AND MIXTURES OF THE FOREGOING.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |