US3157615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiozonants and antiozonant compositions for elastomers
Assignee: Eastman Kodak Co
•
Filing: 1956-08-28
•
Granted: 1964-11-17
•
Expires: 1976-08-28
Abstract
No abstract record available.
Inventors
- 👤 Eldon E Stahly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:24
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
33 words
A SULFUR VULCANIZABLE RUBBER NORMALLY SUBJECT TO CRACKING CONTAINING IN SUFFICIENT AMOUNT TO RETARD SAID CRACKING, A SUBSTITUTED P-PHENYLENE DIAMINE SELECTED FROM THE GROUP CONSISTING OF THE TETRA-SUBSTITUTED P-PHENYLENE DIAMINES HAVING THE FORMULAE:
Claim 2
Dependent Claim
33 words
A SULFUR VULCANIZABLE RUBBER NORMALLY SUBJECT TO CRACKING CONTAINING IN SUFFICIENT AMOUNT TO RETARD SAID CRACKING, A SUBSTITUTED P-PHENYLENE DIAMINE SELECTED FROM THE GROUP CONSISTING OF THE TETRA-SUBSTITUTED P-PHENYLENE DIAMINES HAVING THE FORMULAE:
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |