US3078231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled developer for use in electro-photography and electro-radiography
Assignee: Australian Government
•
Filing: 1960-05-12
•
Granted: 1963-02-19
•
Expires: 1980-05-12
Abstract
No abstract record available.
Inventors
- 👤 Metcalfe Kenneth Archibald
- 👤 Wright Robert John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:37
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/132; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN IMPROVED CONTROLLED BUT UNFIXED LIQUID DEVELOPER FOR A XEROGRAPHIC IMAGE CONSISTING ESSENTIALLY OF, PIGMENT PARTICLES IN FINELY DIVIDED PARTICULATE FORM, AN ORGANIC DIELECTRIC MATERIAL CAPABLE OF FORMING A RESINOUS COATING ON THE PIGMENT PARTICLES, COATING SAID PIGMENT PARTICLES AND ADAPTED FOR INSURING THAT THE PARTICLES HAVE A CHARGE OS SUBSTANTIALLY UNIFORM AND MAGNITUDE, AND A CARRIER LIQUID FOR SAID PIGMENT PARTICLES IN WHICH SAID MATERIAL IS INSOLUBLE WHEREBY SAID PARTICLES ARE MOVED AND DEPOSITED UNDER INFLUENCE OF THE CHARGE OF THE MATERIAL WHEN SUSPENDED IN SAID INSULATING LIQUID BUT ARE NOT FIXED TO THE IMAGE AFTER EVAPORATION OF THE CARRIER LIQUID.
Claim 2
Dependent Claim
102 words
AN IMPROVED CONTROLLED BUT UNFIXED LIQUID DEVELOPER FOR A XEROGRAPHIC IMAGE CONSISTING ESSENTIALLY OF, PIGMENT PARTICLES IN FINELY DIVIDED PARTICULATE FORM, AN ORGANIC DIELECTRIC MATERIAL CAPABLE OF FORMING A RESINOUS COATING ON THE PIGMENT PARTICLES, COATING SAID PIGMENT PARTICLES AND ADAPTED FOR INSURING THAT THE PARTICLES HAVE A CHARGE OS SUBSTANTIALLY UNIFORM AND MAGNITUDE, AND A CARRIER LIQUID FOR SAID PIGMENT PARTICLES IN WHICH SAID MATERIAL IS INSOLUBLE WHEREBY SAID PARTICLES ARE MOVED AND DEPOSITED UNDER INFLUENCE OF THE CHARGE OF THE MATERIAL WHEN SUSPENDED IN SAID INSULATING LIQUID BUT ARE NOT FIXED TO THE IMAGE AFTER EVAPORATION OF THE CARRIER LIQUID.
References Cited (Backward Citations)
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US2638416A
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US2618551A
Cited
US2891911A
Cited
US2907674A
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US2877133A
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US2899335A
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US2891011A
Cited
US3053688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |