US3241957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of developing electrostatic images and liquid developer
Assignee: Harris Graphics Corp
•
Filing: 1961-06-08
•
Granted: 1966-03-22
•
Expires: 1981-06-08
Abstract
No abstract record available.
Inventors
- 👤 Donald L Fauser
- 👤 Edwin R Kolb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:46
CPC Classifications
G; G03; G03G; G03G8/00; G03G13/00; G03G13/06; G03G13/10; G03G15/00; G03G15/01; G03G15/0142; G03G15/0178; G03G15/0194; G03G15/22; G03G5/00; G03G5/12; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/132
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A METHOD OF FORMING AN IMAGE PATTERN OF MARKING ELEMENTS ON AN ELECTROPHOTOGRAPHIC IMAGE MEMBER, COMPRISING THE STEPS OF PROVIDING AN ELECTROPHOTOGRAPHIC IMAGING MEMBER HAVING AN ELECTROPHOTOGRAPHIC SURFACE WHICH INCLUDES A PHOTOCONDUCTOR MATERIAL DISPERSED THROUGHOUT A RESIN MATERIAL HAVING POLAR FUNCTIONAL GROUPS, FORMING AN ELECTROSTATIC LATENT IMAGE ON SAID SURFACE, TREATING SAID SURFACE WITH A LIQUID DEVELOPER COMPOSITION INCLUDING A NON-POLAR ELECTRICALLY INSULATING LIQUID SUSPENSION MEDIUM HAVING DISPERSED THEREIN MARKING ELEMENTS CAPABLE OF BEING ATTRACTED TO THE IMAGE AREAS OF SAID SURFACE, SAID MARKING ELEMENTS INCLUDING FINELY DIVIDED COLORED PIGMENT MATERIAL CARRYING IN PREFERENTIAL ASSOCIATION THEREWITH A LIQUID RESIN MATERIAL FOR FIXING
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |