Patent US3311490A successfully refreshed from Google Patents.
US3311490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing electrostatic charge image with a liquid developer of two immiscible phases
Assignee: Harris Graphics Corp
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Filing: 1958-09-23
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Granted: 1967-03-28
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Expires: 1978-09-23
Abstract
No abstract record available.
Inventors
- 👤 Donald L Fauser
- 👤 Edwin R Kolb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:59
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/122; G03G13/00; G03G13/06; G03G13/10; G03G13/26; G03G13/28; G03G15/00; G03G15/06; G03G15/10; G03G15/108; G03G5/00; G03G5/005; G03G9/135; G03G9/1355
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN AN ELECTROPHOTOGRAPHIC PROCESS OF THE CHARACTER DESCRIBED IN WHICH AN ELECTROSTATIC CHARGE IMAGE IS PRODUCED ON AN ELECTROPHOTOGRAPHIC SURFACE, THE DEVELOPING STEPS WHICH COMPRISE TREATING SAID SURFACE WITH AN ELECTROSTATIC CHARGE IMAGE THEREON WITH A LIQUID DEVELOPER OF TWO SUBSTANTIALLY IMMISCIBLE PHASES AT LEAST THE CONTINUOUS PHASE COMPRISING A LIQUID OF HIGH ELECTRICAL RESISTIVITY, THE DISPERSED PHASE FORMING A DEVELOPER AGENT AND COMPRISING A RESIN DISSOLVED IN A SOLVENT AND CARRYING AN ELECTROSTATIC CHARGE, SAID SOLVENT BEING IMMISCIBLE WITH SAID CONTINUOUS PHASE, MAINTAINING SAID SURFACE IN CONTACT WITH SAID LIQUID DEVELOPER FOR DEVELOPMENT OF SAID CHARGE IMAGE, AND EFFECTING SUBSTANTIALLY PERMANENT ADHESION OF THE DEVELOPED IMAGE ON SAID SURFACE BY REMOVING SAID LIQUID OF HIGH ELECTRICAL RESISTIVITY AND THE SOLVENT FOR THE DISSOLVED RESIN.
Claim 2
Dependent Claim
125 words
IN AN ELECTROPHOTOGRAPHIC PROCESS OF THE CHARACTER DESCRIBED IN WHICH AN ELECTROSTATIC CHARGE IMAGE IS PRODUCED ON AN ELECTROPHOTOGRAPHIC SURFACE, THE DEVELOPING STEPS WHICH COMPRISE TREATING SAID SURFACE WITH AN ELECTROSTATIC CHARGE IMAGE THEREON WITH A LIQUID DEVELOPER OF TWO SUBSTANTIALLY IMMISCIBLE PHASES AT LEAST THE CONTINUOUS PHASE COMPRISING A LIQUID OF HIGH ELECTRICAL RESISTIVITY, THE DISPERSED PHASE FORMING A DEVELOPER AGENT AND COMPRISING A RESIN DISSOLVED IN A SOLVENT AND CARRYING AN ELECTROSTATIC CHARGE, SAID SOLVENT BEING IMMISCIBLE WITH SAID CONTINUOUS PHASE, MAINTAINING SAID SURFACE IN CONTACT WITH SAID LIQUID DEVELOPER FOR DEVELOPMENT OF SAID CHARGE IMAGE, AND EFFECTING SUBSTANTIALLY PERMANENT ADHESION OF THE DEVELOPED IMAGE ON SAID SURFACE BY REMOVING SAID LIQUID OF HIGH ELECTRICAL RESISTIVITY AND THE SOLVENT FOR THE DISSOLVED RESIN.
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |