Patent US4168378A successfully refreshed from Google Patents.
US4168378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-(9-Julolidinyl)-3-(diphenylamino)phthalides
Assignee: HD ACQUISITION CORP A CORP OF DE
•
Filing: 1977-08-04
•
Granted: 1979-09-18
•
Expires: 1997-08-04
Abstract
Abstract 3-[4-Disubstituted-amino)phenyl] or (9-julolidinyl)-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive and thermal marking systems are prepared by reaction of 2-[4-disubstituted-amino)benzoyl] or (9-julolidinyl-carbonyl)benzoic acids with diphenylamines.
Inventors
- 👤 Paul J. Schmidt
- 👤 William M. Hung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:24
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/90; B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145; B41M5/26; B41M5/30; B41M5/323; B41M5/327
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A compound having the formula ##STR17## wherein Q 4 , Q 5 , Q 6 and Q 7 are hydrogen; Y 1 , Y 2 , Y 3 and Y 4 are the same or different and are selected from the group consisting of hydrogen, lower-alkoxy and alkyl having from 1 to 9 carbon atoms; and Z is 9-julolidinyl.
Claim 2
Dependent Claim
59 words
A compound having the formula ##STR17## wherein Q 4 , Q 5 , Q 6 and Q 7 are hydrogen; Y 1 , Y 2 , Y 3 and Y 4 are the same or different and are selected from the group consisting of hydrogen, lower-alkoxy and alkyl having from 1 to 9 carbon atoms; and Z is 9-julolidinyl.
Claim 3
Dependent Claim
34 words
A compound according to claim 1 wherein Y 1 , Y 2 , Y 3 and Y 4 are the same or different and are selected from the group consisting of hydrogen and lower-alkoxy.
Claim 4
Dependent Claim
5 words
3-(9-Julolidinyl)-3-[N-(4-ethoxyphenyl)-N-phenylamino]phthalide according to claim 2.
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) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |