US3883549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent aryl 3,3-pyrazolyl-2-pyrazolines
Assignee: 3M Co
•
Filing: 1973-02-05
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Granted: 1975-05-13
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Expires: 1993-02-05
Abstract
Abstract WHEREIN R1 - R4 independently represent a hydrogen atom, alkyl, or aralkyl group and R5 and R6 independently represent an aryl group. D R A W I N G Aryl-3,3''-pyrazolyl-2-pyrazolines are found to fluoresce when irradiated with ultraviolet light. These compounds have the generic formula:
Inventors
- 👤 Ian Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:07
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
5 words
AN ARYL-3,3''-PYRAZOLYL-2-PYRAZOLINE OF THE FORMULA:
Claim 2
Dependent Claim
5 words
AN ARYL-3,3''-PYRAZOLYL-2-PYRAZOLINE OF THE FORMULA:
Claim 3
Dependent Claim
5 words
An aryl-3,3''-pyrazolyl-2-pyrazoline having the formula:
Claim 4
Dependent Claim
5 words
An aryl-3,3''-pyrazolyl-2-pyrazoline having the formula:
Claim 5
Dependent Claim
1 words
1,1''-Diphenyl-3,3''-pyrAzolyl-2-pyrazoline.
Claim 6
Dependent Claim
1 words
1,1''-Diphenyl-3,3''-pyrAzolyl-2-pyrazoline.
Claim 7
Dependent Claim
1 words
4,4''-Dimethyl-1,1''-diphenyl-3,3''-pyrazolyl2-pyrazoline.
Claim 8
Dependent Claim
1 words
4,4''-Dimethyl-1,1''-diphenyl-3,3''-pyrazolyl2-pyrazoline.
Claim 9
Dependent Claim
1 words
1,1''-Di-(p-chlorphenyl)-3,3''-pyrazolyl-pyrazoline.
Claim 10
Dependent Claim
1 words
1,1''-Di-(p-chlorphenyl)-3,3''-pyrazolyl-pyrazoline.
Claim 11
Dependent Claim
1 words
1,1''-Di-(p-tolyl)-3,3''-pyrazolyl-2-pyrazoline.
Claim 12
Dependent Claim
1 words
1,1''-Di-(p-tolyl)-3,3''-pyrazolyl-2-pyrazoline.
Claim 13
Dependent Claim
1 words
5,5''-Dimethyl-1,1''-diphenyl-3,3''-pyrazolyl-2-pyrazoline.
Claim 14
Dependent Claim
1 words
5,5''-Dimethyl-1,1''-diphenyl-3,3''-pyrazolyl-2-pyrazoline.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |