US3225061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 2,5-diarylpyrrole
Assignee: Millennium Petrochemicals Inc
•
Filing: 1962-10-17
•
Granted: 1965-12-21
•
Expires: 1982-10-17
Abstract
No abstract record available.
Inventors
- 👤 Braus Harry
- 👤 Fred D Waas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:50
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/32; C07D207/325; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
1-(4''-AMINOPHENYL)-2,5-DIPHENYLPYRROLE.
Claim 2
Dependent Claim
1 words
1-(4''-AMINOPHENYL)-2,5-DIPHENYLPYRROLE.
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2478452A
Cited
US2488336A
Cited
US3005779A
Cited
US2983686A
Cited
US2986564A
Cited
US3068236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |