US4834920A
Expired / Lapsed
US
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New quaternary ammonium salts
Assignee: Eastman Kodak Co
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Filing: 1987-12-17
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Granted: 1989-05-30
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Expires: 2007-12-17
Abstract
Abstract New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure <IMAGE> wherein R is alkyl having 12 to 18 carbon atoms.
Inventors
- 👤 Douglas E. Bugner
- 👤 Peter S. Alexandrovich
- 👤 Lawrence P. DeMejo
- 👤 Robert A. Guistina
- 👤 James H. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:40
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09741; C; C07; C07C; C07C211/00; C07C211/62; C07C211/63; C07C309/00; C07C309/01; C07C309/28; C07C309/40; G03G9/0975; G03G9/10; G03G9/113; G03G9/1138
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
18 words
A quaternary ammonium salt having the structure ##STR3## wherein R is alkyl having 12 to 18 carbon atoms.
Claim 2
Dependent Claim
18 words
A quaternary ammonium salt having the structure ##STR3## wherein R is alkyl having 12 to 18 carbon atoms.
Claim 3
Dependent Claim
15 words
The salt of claim 1, wherein R is 10CH 3 (CH 2 ) 17 .
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |