US3770637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid developer for developing electrostatic latent image
Assignee: Ricoh Co Ltd
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Filing: 1971-09-16
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Granted: 1973-11-06
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Expires: 1991-09-16
Abstract
Abstract A LIQUID DEVELOPER FOR USE IN DEVELOPING AN ELECTROSTATIC LATENT IMAGE FORMED ON AN ELECTRONSTATIC RECORDING MATERIAL OR AN ELECTROPHOTOGRAPHIC COPYING MATERIAL WHICH IS PREPARED BY DISPERSING, IN A SUITABLE CARRIER LIQUID, IN TONER CONSISTING ESSENTIALLY OF PIGMENT PARTICLES WHOSE SURFACES ARE COATED WITH A COATING AGENT, SAID COATING AGENT CONSISTING OF A FIRST RESIN HAVING A HIGH SOLUBILITY IN SAID CARRIER LIQUID AND A SECOND RESIN HAVING A LOW SOLUBILITY IN SAID CARRIER LIQUID.
Inventors
- 👤 Z Okuno
- 👤 A Mizuno
- 👤 I Kondoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:37
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/131; G03G9/132
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |