US3676394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiozonant rubber compositions
Assignee: AT&T Inc
•
Filing: 1969-11-10
•
Granted: 1972-07-11
•
Expires: 1989-11-10
Abstract
Abstract Vulcanized rubbery polymers may be effectively protected against ozone cracking by incorporation therein of certain non-primary aliphatic diamines, triamines and tetramines.
Inventors
- 👤 Robert W Murray
- 👤 Paul R Story
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:52
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
A composition in accordance with claim 1 wherein said antiozonant is a triamine.
Claim 2
Dependent Claim
13 words
A composition in accordance with claim 1 wherein said antiozonant is a tetramine.
Claim 3
Dependent Claim
14 words
A composition in accordance with claim 2 wherein said antiozonant is a di-secondary-tertiary amine.
Claim 4
Dependent Claim
14 words
A composition in accordance with claim 3 wherein said antiozonant is a di-secondary-di-tertiary amine.
References Cited (Backward Citations)
CA545381A
Cited
US2058615A
Cited
US2382792A
Cited
US2697700A
Cited
US2729691A
Cited
US2829121A
Cited
US3098841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |