US2879269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble diphenylamine dyestuffs
Assignee: Saul and Co
•
Filing: 1956-10-15
•
Granted: 1959-03-24
•
Expires: 1976-10-15
Abstract
No abstract record available.
Inventors
- 👤 Merian Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
C; C09; C09B; C09B56/00; C09B56/005; C09B51/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A WATER-INSOLUBLE DIPHENYLAMINE DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
7 words
A WATER-INSOLUBLE DIPHENYLAMINE DYESTUFF OF THE FORMULA
Claim 3
Dependent Claim
9 words
THE WATER-INSOLUBLE DIPHENYLAMINE DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 4
Dependent Claim
9 words
THE WATER-INSOLUBLE DIPHENYLAMINE DYESTUFF WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
US2725390A
Cited
CH504428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |