US2840567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-(p-aminophenyl)-3-aminopyrazolines and process
Assignee: Bayer AG
•
Filing: 1955-06-14
•
Granted: 1958-06-24
•
Expires: 1975-06-14
Abstract
No abstract record available.
Inventors
- 👤 Mersch Rudolf
- 👤 Delfs Detlef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:58
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/06; C07D231/08; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3028; G03C5/3035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
AS A NEW CHEMICAL COMPOUND, A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE FREE BASES AND THEIR SALTS COMPOUNDS HAVING THE TAUTOMERIC GENERAL FORMULAE
Claim 2
Dependent Claim
25 words
AS A NEW CHEMICAL COMPOUND, A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE FREE BASES AND THEIR SALTS COMPOUNDS HAVING THE TAUTOMERIC GENERAL FORMULAE
References Cited (Backward Citations)
GB679678A
Cited
US2726248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |