US3852275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrazoline optical brightening agents
Assignee: PRODUITS CHIMIQUES UGINE KUKLMANN
•
Filing: 1971-11-24
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Granted: 1974-12-03
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Expires: 1991-11-24
Abstract
Abstract The present invention provides compounds of the formula: WHEREIN Ar represents an aromatic residue which may be substituted by substituents not having a chromophoric or anionic character, R1 and R2 represent alkyl groups containing one to five carbon atoms, which may be the same or different, n is 2 or 3 and X represents a monovalent anion or its equivalent. It also relates to the preparation of such compounds and to their use in optical brightening or whitening fibres based on polymers or copolymers of acrylonitrile.
Inventors
- 👤 S Michel
- 👤 A Domergue
- 👤 G Mingasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:58
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/06; C08; C08K; C08K5/00; C08K5/36; C08K5/43
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
5 words
S,S-Dimethyl-S-(4''(4''-chloro-3-phenyl- Delta 2-pyrazolinyl)-2-phenyl-sulphonylamino-ethyl) sulphonium methyl-sulphate.
Claim 4
Dependent Claim
5 words
S,S-Dimethyl-S-(4''(4''-chloro-3-phenyl- Delta 2-pyrazolinyl)-2-phenyl-sulphonylamino-ethyl) sulphonium methyl-sulphate.
Claim 5
Dependent Claim
5 words
S,S-Dimethyl-S-(4''-(4''-chloro-3-phenyl- Delta 2-pyrazolinyl)-3-phenyl-sulphonylamino-propyl) sulphonium methyl-sulphate.
Claim 6
Dependent Claim
5 words
S,S-Dimethyl-S-(4''-(4''-chloro-3-phenyl- Delta 2-pyrazolinyl)-3-phenyl-sulphonylamino-propyl) sulphonium methyl-sulphate.
Claim 7
Dependent Claim
5 words
S-Methyl-S-ethyl-S-(4''-(4''-chloro-3-phenyl- Delta 2-pyrazolinyl)-2-phenylsulphonylamino-ethyl) sulphonium ethyl-sulphate.
Claim 8
Dependent Claim
5 words
S-Methyl-S-ethyl-S-(4''-(4''-chloro-3-phenyl- Delta 2-pyrazolinyl)-2-phenylsulphonylamino-ethyl) sulphonium ethyl-sulphate.
Claim 9
Dependent Claim
6 words
A Delta 2-pyrazoline of the formula:
Claim 10
Dependent Claim
6 words
A Delta 2-pyrazoline of the formula:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |