US3872114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzofurane derivatives, process for their manufacture and their use as optical brighteners
Assignee: Hoechst AG
•
Filing: 1973-07-09
•
Granted: 1975-03-18
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Expires: 1993-07-09
Abstract
Abstract Benzofuryl-aryl ethylenes, which are obtainable by HORNER Syntheses, are useful as optical brighteners, especially in surfactants.
Inventors
- 👤 Wilfried Sahm
- 👤 Erich Schinzel
- 👤 Gunter Rosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:34
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60
Claims Analysis
Total Claims: 19
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
136 words
A compound as defined in claim 1, wherein P and Q are hydrogen, chlorine, methyl, methoxy or phenyl, or P and Q together are trimethylene, tetramethylene or an annellated phenyl nucleus, R is hydrogen or methyl, and B is phenyl substituted by one or two substituents selected from the group consisting of chlorine, methyl, methoxy, phenyl, amino, lower alkylamino, di-(lower alkyl)-amino; tri-(lower alkyl) ammonium chloride, methosulfate or tosylate; acetamino, cyano or a group of the formula -COOR1, -SO2OR1, -CONR2R3 or SO2-NR2R3 wherein R1 is hydrogen, lower alkyl or alkyl of 2 or 3 carbon atoms substituted by hydroxy, lower alkoxy, di-(lower alkyl(amino amino or tri-(lower alkyl)-ammonium chloride, methosulfate or tosylate; R2 and R3 are hydrogen, lower alkyl or alkyl of 2 or 3 carbon atoms substituted by di-(lower alkyl)-amino or tri(lower alkyl)-ammonium chloride, methosulfate or tosylate.
Claim 4
Dependent Claim
48 words
A compound as defined in claim 1, wherein P and Q are hydrogen or methyl or P and Q together are trimethylene, tetramethylene or an annellated phenyl nucleus, R is hydrogen or methyl and B is phenyl substituted in ortho- or para-position by phenyl, cyano or lower carboalkoxy
Claim 5
Dependent Claim
22 words
A compound as defined in claim 1, wherein P and Q are bound to the 5- and 6-position of the benzofurane nucleus.
Claim 6
Dependent Claim
14 words
A compound as defined in claim 1, wherein B is p-cyanophenyl, p-carbomethoxyphenyl or p-biphenylyl.
Claim 7
Dependent Claim
22 words
A compound as defined in claim 5, wherein R is hydrogen, P is hydrogen or 5-methyl and Q is hydrogen of 6-methyl.
Claim 8
Dependent Claim
18 words
The compound as defined in claim 1, wherein P, Q and R are hydrogen and B is p-cyanophenyl.
Claim 9
Dependent Claim
21 words
The compound as defined in claim 1, wherein P is hydrogen, Q is 6-methyl, R is hydrogen and B is p-cyanophenyl.
Claim 10
Dependent Claim
20 words
The compound as defined in claim 1, wherein Q and R are hydrogen, P is 5-methyl and B is p-cyanophenyl.
Claim 11
Dependent Claim
22 words
The compound as defined in claim 1, wherein P is 5 methyl, Q is 6-methyl, R is hydrogen and B is p-cyanophenyl.
Claim 12
Dependent Claim
18 words
The compound as defined in claim 1, wherein P, Q and R are hydrogen and B is p-carbomethoxyphenyl.
Claim 13
Dependent Claim
20 words
The compound as defined in claim 1, wherein P and R are hydrogen, Q is 6-methyl and B is p-carbomethoxyphenyl.
Claim 14
Dependent Claim
20 words
The compound as defined in claim 1, wherein Q and R are hydrogen, P is 5-methyl and B is p-carbomethoxyphenyl.
Claim 15
Dependent Claim
21 words
The compound as defined in claim 1, wherein P is 5-methyl, Q is 6-methyl, R is hydrogen and B is p-carbomethoxyphenyl.
Claim 16
Dependent Claim
18 words
The compound as defined in claim 1, wherein P, Q and R are hydrogen and B is p-biphenylyl.
Claim 17
Dependent Claim
20 words
The compound as defined in claim 1, wherein P and R are hydrogen, Q is 6-methyl and B is p-biphenylyl.
Claim 18
Dependent Claim
20 words
The compound as defined in claim 1, wherein Q and R are hydrogen, P is 5-methyl and B is p-bisphenylyl.
Claim 19
Dependent Claim
21 words
The compound as defined in claim 1, wherein P is 5-methyl, Q is 6-methyl, R is hydrogen and B is p-biphenylyl.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |