Patent US2957163A successfully refreshed from Google Patents.
US3256197A
Expired / Lapsed
US
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Liquid developer for electrostatic charge images
Assignee: Harris Graphics Corp
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Filing: 1963-07-26
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Granted: 1966-06-14
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Expires: 1983-07-26
Abstract
No abstract record available.
Inventors
- 👤 Donald L Fauser
- 👤 Edwin R Kolb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:15
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/10; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
AN ELECTROPHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING AN EMULSION OF TWO SUBSTANTIALLY IMMISCIBLE LIQUID PHASES AT LEAST THE CONTINUOUS PHASE THEREOF COMPRISING A LIQUID OF HIGH ELECTRICAL RESISTIVITY, THE DISPERSED PHASE COMPRISING A RESIN DISSOLVED IN A SOLVENT AND CARRYING AN
Claim 2
Dependent Claim
39 words
AN ELECTROPHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING AN EMULSION OF TWO SUBSTANTIALLY IMMISCIBLE LIQUID PHASES AT LEAST THE CONTINUOUS PHASE THEREOF COMPRISING A LIQUID OF HIGH ELECTRICAL RESISTIVITY, THE DISPERSED PHASE COMPRISING A RESIN DISSOLVED IN A SOLVENT AND CARRYING AN
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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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |