US3809554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry electrostatic toner composition and process of developing
Assignee: Eastman Kodak Co
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Filing: 1971-08-02
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Granted: 1974-05-07
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Expires: 1991-08-02
Abstract
Abstract UNIFORMLY CHARGING ELECTROCOPIC TONER COMPOSITIONS FOR USE IN DEVELOPING ELECTROSTATIC CHARGE PATTERNS ARE DESCRIBED. DRY DEVELOPER COMPOSITIONS CONTAINING A CARRIER AND SAID UNIFORMLY CHARGING TONER ARE ALSO DESCRIBED. THE TONER COMPOSITIONS CONTAIN AROMATIC RESINS CHARACTERIZED BY A RECURRING UNIT CONTAINING ALTERNATING METHYLENE GROUPS AND CERTAIN AROMATIC GROUPS.
Inventors
- 👤 S Merrill
- 👤 J Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:11
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08746; G03G9/08751; G03G9/08702; G03G9/08722; G03G9/08784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |