US3009899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber containing para-phenylenediamine antiozonants
Assignee: Eastman Kodak Co
•
Filing: 1958-02-14
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Granted: 1961-11-21
•
Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 Stahly Eldon Everett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:09
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
47 words
A SULFUR VULCANIZABLE RUBBER NORMALLY SUBJECT TO CRACKING CONTAINING, IN SUFFICIENT AMOUNT TO RETARD SAID CRACKING, AN ANTIOZONANT COMPOSITION ESSENTIALLY COMPRISING A P-PHENYLENE DIAMINE HAVING ATTACHED TO EACH OF ITS NITROGEN ATOMS A METHYL GROUP AND A TERTIARY ALKYL GROUP CONTAINING FROM 8 TO 12 CARBON ATOMS.
Claim 2
Dependent Claim
47 words
A SULFUR VULCANIZABLE RUBBER NORMALLY SUBJECT TO CRACKING CONTAINING, IN SUFFICIENT AMOUNT TO RETARD SAID CRACKING, AN ANTIOZONANT COMPOSITION ESSENTIALLY COMPRISING A P-PHENYLENE DIAMINE HAVING ATTACHED TO EACH OF ITS NITROGEN ATOMS A METHYL GROUP AND A TERTIARY ALKYL GROUP CONTAINING FROM 8 TO 12 CARBON ATOMS.
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) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |