US2768208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N, n' substituted diethyl p-phenylene diamine antioxidants
Assignee: EIDP Inc
•
Filing: 1954-05-25
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Granted: 1956-10-23
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Expires: 1974-05-25
Abstract
No abstract record available.
Inventors
- 👤 Pedersen Charles John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
COMPOUNDS OF THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
COMPOUNDS OF THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
GB302985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |