US4465857A
Expired / Lapsed
US
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Phenylhydrazones
Assignee: BASF SE
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Filing: 1982-12-29
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Granted: 1984-08-14
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Expires: 2002-12-29
Abstract
Abstract Phenylhydrazones of the formula ##STR1## where R 1 is C 1 -C 4 -alkyl or phenyl-C 1 -C 4 -alkyl, or is phenyl which is unsubstituted or substituted by alkyl, alkoxy or halogen, or is a radical ##STR2## R 2 is alkyl or is phenyl which is unsubstituted or substituted by alkyl, alkoxy or halogen, and R 4 and R 5 independently of one another are each H, alkyl, alkoxy or halogen, are very useful as charge carrier-transporting compounds for electrophotographic recording materials.
Inventors
- 👤 Peter Neumann
- 👤 Karl-Heinz Etzbach
- 👤 Heinz Eilingsfeld
- 👤 Gerhard Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:12
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/72; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0616
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
A phenylhydrazone of the formula ##STR17## where R 1 is C 1 -C 4 -alkyl or phenyl-C 1 -C 4 -alkyl, or is phenyl which is unsubstituted or substituted by C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen, or is a radical of the formula ##STR18## R 2 is C 1 -C 4 -alkyl or is phenyl which is unsubstituted or substituted by C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen, and R 4 and R 5 independently of one another are each hydrogen, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen.
Claim 2
Dependent Claim
104 words
A phenylhydrazone of the formula ##STR17## where R 1 is C 1 -C 4 -alkyl or phenyl-C 1 -C 4 -alkyl, or is phenyl which is unsubstituted or substituted by C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen, or is a radical of the formula ##STR18## R 2 is C 1 -C 4 -alkyl or is phenyl which is unsubstituted or substituted by C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen, and R 4 and R 5 independently of one another are each hydrogen, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogen.
Claim 3
Dependent Claim
15 words
A phenylhydrazone as claimed in claim 1, wherein R 1 is methyl, ethyl or phenyl.
Claim 4
Dependent Claim
15 words
A phenylhydrazone as claimed in claim 1, wherein R 2 is methyl, ethyl or phenyl.
Claim 5
Dependent Claim
23 words
A phenylhydrazone as claimed in claim 1, wherein R 1 and R 2 independently of one another are each methyl, ethyl or phenyl.
Claim 6
Dependent Claim
16 words
A phenylhydrazone as claimed in claim 1, wherein R 4 and R 5 are each hydrogen.
Claim 7
Dependent Claim
16 words
A phenylhydrazone as claimed in claim 2, wherein R 4 and R 5 are each hydrogen.
Claim 8
Dependent Claim
16 words
A phenylhydrazone as claimed in claim 3, wherein R 4 and R 5 are each hydrogen.
Claim 9
Dependent Claim
16 words
A phenylhydrazone as claimed in claim 4, wherein R 4 and R 5 are each hydrogen.
Claim 10
Dependent Claim
21 words
A phenylhydrazone of the formula ##STR19## where R 7 and R 8 independently of one another are each methyl or phenyl.
Claim 11
Dependent Claim
21 words
A phenylhydrazone of the formula ##STR19## where R 7 and R 8 independently of one another are each methyl or phenyl.
Claim 12
Dependent Claim
16 words
A phenylhydrazone as claimed in claim 9, wherein R 7 and R 8 are each methyl.
Claim 13
Dependent Claim
16 words
A phenylhydrazone as claimed in claim 9, wherein R 7 and R 8 are each phenyl.
Claim 14
Dependent Claim
17 words
A phenylhydrazone as claimed in claim 9, wherein R 7 is phenyl and R 8 is methyl.
Claim 15
Dependent Claim
17 words
A phenylhydrazone as claimed in claim 9, wherein R 7 is methyl and R 8 is phenyl.
References Cited (Backward Citations)
US4150987A
Cited
DE3124396A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |