US3079890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic developing unit
Assignee: Research Laboratories of Australia Pty Ltd
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Filing: 1961-03-16
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Granted: 1963-03-05
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Expires: 1981-03-16
Abstract
No abstract record available.
Inventors
- 👤 Oliphant Keith Meredith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
AN IMPROVED XEROGRAPHIC DEVELOPER UNIT COMPRISING: A NEARLY VERTICAL SUPPORT MEMBER; MEANS TO HOLD AN IMAGE SHEET, HAVING AN ELECTROSTATIC CHARGE IMAGE THEREON, ON SAID SUPPORT MEMBER; HORIZONTAL RUNWAYS EXTENDING ACROSS THE TOP OF SAID SUPPORT MEMBER; A NOZZLE, MOUNTED ON SAID RUNWAYS FOR MOVEMENT THEREALONG, FOR DISCHARGING A FLUID DEVELOPER ONTO AN IMAGE SHEET SUPPORTED ON SAID SUPPORT MEMBER; FLEXIBLE DRIVE MEANS EXTENDING ACROSS SAID SUPPORT MEMBER IN PARALLEL RELATION TO SAID RUNWAYS AND ENGAGED WITH SAID NOZZLE; A PAIR OF OPPOSITELY DRIVEN ROLLS; MEANS FOR ALTERNATELY CONNECTING SAID ROLLERS IN DRIVING RELATION TO SAID DRIVE MEANS TO MOVE SAID NOZZLE ACROSS THE TOP OF SAID SUPPORT MEMBER AND DISTRIBUTE FLUID DEVELOPER ACROSS THE ENTIRE SURFACE OF SAID SHEET; A RESERVOIR TROUGH FOR STORING A SUPPLY OF A FLUID DEVELOPER, DISPOSED AT THE BOTTOM OF SAID SUPPORT MEMBER IN POSITION TO RECEIVE AND STORE EXCESS DEVELOPER FLOWING DOWNWARDLY
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |