US4935487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonate-arylamine polymer
Assignee: Xerox Corp
•
Filing: 1988-11-23
•
Granted: 1990-06-19
•
Expires: 2008-11-23
Abstract
Abstract A polymeric arylamine represented by repeating units having the formula: ##STR1## wherein: n is between about 5 and about 5,000, Z is selected from certain specified aromatic and fused ring groups, m is 0 or 1, Ar' is selected from certain specified aromatic groups, and Ar is selected from certain specified aromatic groups.
Inventors
- 👤 John F. Yanus
- 👤 John W. Spiewak
- 👤 Dale S. Renfer
- 👤 William W. Limburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:12
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G64/12; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/075; G03G5/076; G03G5/0763
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A polymeric arylamine represented by repeating units having the formula: ##STR12## wherein: n is between about 5 and about 5,000, Z is selected from the group consisting of: ##STR13## m is 0 or 1, s is 0, 1, 2 or 3, Ar' is selected from the group consisting of: ##STR14## X is selected from the group consisting of: ##STR15## s' is 0, 1 or 2, Ar is selected from the group consisting of: ##STR16## R is selected from the group consisting of --CH 3 , --C 2 H 5 , --C 3 H 7 , and --C 4 H 9 .
Claim 2
Dependent Claim
101 words
A polymeric arylamine represented by repeating units having the formula: ##STR12## wherein: n is between about 5 and about 5,000, Z is selected from the group consisting of: ##STR13## m is 0 or 1, s is 0, 1, 2 or 3, Ar' is selected from the group consisting of: ##STR14## X is selected from the group consisting of: ##STR15## s' is 0, 1 or 2, Ar is selected from the group consisting of: ##STR16## R is selected from the group consisting of --CH 3 , --C 2 H 5 , --C 3 H 7 , and --C 4 H 9 .
References Cited (Backward Citations)
US3844781A
Cited
US3890146A
Cited
US4052205A
Cited
US4047948A
Cited
US4265990A
Cited
US4346158A
Cited
US4273846A
Cited
EP0034425B1
Cited
US4388392A
Cited
US4415641A
Cited
US4588667A
Cited
US4588666A
Cited
US4806444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |