US3887560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toners
Assignee: Canon Inc
•
Filing: 1971-12-30
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Granted: 1975-06-03
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Expires: 1991-12-30
Abstract
Abstract Toners for developing electrostatic charge images and processes for using said toners to develop electrostatic charge images. The toners comprise compounds produced by the reaction of a dye having an amino group with a halide having more than 5 carbons, said halide being selected from the group consisting of aliphatic halides, aromatic halides, heterocyclic halides, aliphatic acid halides, aromatic acid halides, and heterocyclic acid halides. Such toners are useful in both wet and dry electrostatic developing processes.
Inventors
- 👤 Shinichiro Nagashima
- 👤 Terukuni Tuneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:15
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/0914; G03G9/0924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
AN ACID AMIDO COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
7 words
AN ACID AMIDO COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US3535244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |