US2883362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preventing the cracking of rubber by means of certain n,n,n',n'-tetra-alkyl-p-phenylene diamines
Assignee: Universal Oil Products Co
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Filing: 1953-12-30
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Granted: 1959-04-21
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Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert H Rosenwald
- 👤 Joseph A Chenicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:19
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
62 words
A SULFUR VULCANIZABLE RUBBER NORMALLY SUBJECT TO CRACKING CONTAINING, IN SUFFICIENT AMOUNT TO RETARD SAID CRACKING, A P-PHENYLENE DIAMINE HAVING ATTACHED TO EACH OF ITS NITROGEN ATOMS AN ALKYL GROUP OF FROM 1 TO 6 CARBON ATOMS AND AN ALKYL GROUP OF FROM 6 TO 20 CARBON ATOMS AND CONTAINING A GREATER NUMBER OF CARBON ATOMS THAN SAID FIRST MENTIONED ALKYL GROUP.
Claim 2
Dependent Claim
62 words
A SULFUR VULCANIZABLE RUBBER NORMALLY SUBJECT TO CRACKING CONTAINING, IN SUFFICIENT AMOUNT TO RETARD SAID CRACKING, A P-PHENYLENE DIAMINE HAVING ATTACHED TO EACH OF ITS NITROGEN ATOMS AN ALKYL GROUP OF FROM 1 TO 6 CARBON ATOMS AND AN ALKYL GROUP OF FROM 6 TO 20 CARBON ATOMS AND CONTAINING A GREATER NUMBER OF CARBON ATOMS THAN SAID FIRST MENTIONED ALKYL GROUP.
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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |