Patent US4032527A successfully refreshed from Google Patents.
US4032527A
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Phenyljulolidinylphthalides
Assignee: HD ACQUISITION CORP A CORP OF DE
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Filing: 1974-11-27
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Granted: 1977-06-28
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Expires: 1994-11-27
Abstract
Abstract Substituted 3,3-diphenylphthalides, useful as color precursors, particularly in the art of pressure-sensitive duplicating systems, are prepared by condensing substituted 2-benzoylbenzoic acids with substituted anilines.
Inventors
- 👤 Nathan N. Crounse
- 👤 Paul J. Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:47
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/24; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/323; B41M5/327
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
3-(2-X-4-X-Phenyl)-3-(9-julolidinyl)-4-Z 4 -5-Z 5 -6-Z 6 -7-Z 7 -phthalide of the formula ##STR41## wherein: 140°- X is dialkylamino wherein alkyl is non-tertiary alkyl of one to four carbon atoms; Z 4 is hydrogen or halo; Z 5 is hydrogen or halo; or non-tertiary alkyl of one to four carbon atoms, nitro, amino or dialkylamino wherein alkyl is non-tertiary alkyl or one to four carbon atoms when Z 4 , Z 6 and Z 7 are each hydrogen; Z 6 is hydrogen or halo; or non-tertiary alkyl of one to four carbon atoms, nitro, amino or dialkylamino wherein alkyl is non-tertiary alkyl of one to four carbon atoms when Z 4 , Z 5 and Z 7 are each hydrogen; and Z 7 is hydrogen or halo.
Claim 2
Dependent Claim
126 words
3-(2-X-4-X-Phenyl)-3-(9-julolidinyl)-4-Z 4 -5-Z 5 -6-Z 6 -7-Z 7 -phthalide of the formula ##STR41## wherein: 140°- X is dialkylamino wherein alkyl is non-tertiary alkyl of one to four carbon atoms; Z 4 is hydrogen or halo; Z 5 is hydrogen or halo; or non-tertiary alkyl of one to four carbon atoms, nitro, amino or dialkylamino wherein alkyl is non-tertiary alkyl or one to four carbon atoms when Z 4 , Z 6 and Z 7 are each hydrogen; Z 6 is hydrogen or halo; or non-tertiary alkyl of one to four carbon atoms, nitro, amino or dialkylamino wherein alkyl is non-tertiary alkyl of one to four carbon atoms when Z 4 , Z 5 and Z 7 are each hydrogen; and Z 7 is hydrogen or halo.
Claim 3
Dependent Claim
21 words
A compound according to claim 1 wherein Z 4 , Z 5 , Z 6 and Z 7 are each hydrogen.
Claim 4
Dependent Claim
10 words
A compound according to claim 2 wherein X is dimethylamino.
Claim 5
Dependent Claim
21 words
A compound according to claim 1 wherein Z 4 , Z 5 , Z 6 and Z 7 are each halo.
Claim 6
Dependent Claim
10 words
A compound according to claim 4 wherein halo is chloro.
Claim 7
Dependent Claim
10 words
A compound according to claim 5 wherein X is dimethylamino.
References Cited (Backward Citations)
JPS473467U
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |