Patent US4180479A successfully refreshed from Google Patents.
US4180479A
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Stilbene compounds
Assignee: BASF Corp
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Filing: 1977-11-14
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Granted: 1979-12-25
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Expires: 1997-11-14
Abstract
Abstract Novel stilbene compounds of the formula ##STR1## in which A is the radical ##STR2## in which R 1 is hydrogen or chlorine and R 2 is hydrogen or alkyl, Z is hydrogen, chlorine or phenyl and R 3 is hydrogen, alkyl or chlorine, as well as their use in a process for optically brightening organic material are described.
Inventors
- 👤 Adolf E. Siegrist
- 👤 Jean-Paul Pauchard
- 👤 Bernardo DE Sousa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:14
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/75; C07C; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/80; C07C49/813; C07D261/00; C07D261/20; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
A stilbene compound of the formula ##STR39## in which A is the radical ##STR40## in which R 1 is hydrogen or chlorine and R 2 is hydrogen or alkyl having 1 to 4 C atoms, Z is hydrogen, chlorine or phenyl and R 3 is hydrogen, alkyl having 1 to 4 C atoms or chlorine.
Claim 2
Dependent Claim
55 words
A stilbene compound of the formula ##STR39## in which A is the radical ##STR40## in which R 1 is hydrogen or chlorine and R 2 is hydrogen or alkyl having 1 to 4 C atoms, Z is hydrogen, chlorine or phenyl and R 3 is hydrogen, alkyl having 1 to 4 C atoms or chlorine.
Claim 3
Dependent Claim
26 words
A stilbene compound according to claim 1 of the formula ##STR41## in which R 1 is hydrogen or chlorine and Z is hydrogen, chlorine or phenyl.
Claim 4
Dependent Claim
19 words
A stilbene compound according to claim 2 of the formula ##STR42## in which Z is hydrogen, chlorine or phenyl.
Claim 5
Dependent Claim
19 words
A stilbene compound according to claim 2 of the formula ##STR43## in which Z is hydrogen, chlorine or phenyl.
Claim 6
Dependent Claim
32 words
A stilbene compound according to claim 1 of the formula ##STR44## in which R 2 is hydrogen or alkyl having 1 to 4 C atoms and Z is hydrogen, chlorine or phenyl.
Claim 7
Dependent Claim
26 words
A stilbene compound according to claim 5 of the formula ##STR45## in which R' 2 is hydrogen or methyl and Z is hydrogen, chlorine or phenyl.
Claim 8
Dependent Claim
26 words
A stilbene compound according to claim 5 of the formula ##STR46## in which R' 2 is hydrogen or methyl and Z is hydrogen, chlorine or phenyl.
Claim 9
Dependent Claim
31 words
A process for optically brightening organic material, wherein a compound as defined in any one of claims 1 to 7 is incorporated into this material or applied to the surface thereof.
Claim 10
Dependent Claim
19 words
A process according to claim 8, wherein synthetic high-molecular organic material, preferably consisting of polyester or polyamide, is brightened.
Claim 11
Dependent Claim
19 words
A process according to claim 9, wherein fabric made of polyester or polyamide is brightened by the pad-thermofixing process.
Claim 12
Dependent Claim
44 words
A process according to claim 8, wherein 0.001 to 2%, and preferably 0.01 to 0.5%, of the brightener, relative to the weight of the material to be optically brightened, is applied to the material to be optically brightened or is incorporated into this material.
Claim 13
Dependent Claim
30 words
Organic material containing 0.001 to 2, and preferably 0.01 to 0.5, percent by weight of one or more stilbene compounds as defined in any one of claims 1 to 7.
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) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |