Patent US4279091A successfully refreshed from Google Patents.
US3244083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic device
Assignee: Xerox Corp
•
Filing: 1962-10-23
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Granted: 1966-04-05
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Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Robert W Gundlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
SELF-REGULATING APPARATUS TO SUCCESSIVELY DEPOSIT ON A CHARGEABLE SURFACE OF AN IMAGE TRANSFER WEB A FIRST ELECTROSTATIC CHARGE AND A SECOND ELECTROSTATIC CHARGE OF EQUAL MAGNITUDE AND OPPOSITE POLARITY TO SAID FIRST ELECTROSTATIC CHARGE, COMPRISING IN COMBINATION: (A) A FIRST CORONA DISCHARGE DEVICE COMPRISING CORONA WIRE POSITIONED WITHIN A CONDUCTIVE SHIELD; (B) A SECOND CORONA DISCHARGE DEVICE COMPRISING CORONA WIRE POSITIONED WITHIN A CONDUCTIVE SHIELD; AND, (C) AN ELECTRICALLY ISOLATED HIGH VOLTAGE POWER SUPPLY; SAID CORONA WIRES OF SAID CORONA DISCHARGE DEVICES BEING RESPECTIVELY CONNECTED TO OPPOSITELY POLED TERMINALS OF SAID POWER SUPPLY, SAID CONDUCITVE SHIELDS, BEING ELECTRICALLY CONNECTED, SAID COMBINATION OF SAID CORONA DISCHARGE DEVICES AND SAID POWER SUPPLY BEING ELECTRICALLY ISOLATED FROM ITS ENVIRONMENT, AND SAID CORONA DISCHARGE DEVICES BEING DISPOSED SO THAT SUCCESSIVE AREAS OF SAID WEB ARE BROUGHT INTO OPERATIVE PROXIMITY WITH SAID FIRST CORONA DISCHARGE DEVICE AND SAID SECOND CORONA DISCHARGE DEVICE RESPECTIVELY.
Claim 2
Dependent Claim
148 words
SELF-REGULATING APPARATUS TO SUCCESSIVELY DEPOSIT ON A CHARGEABLE SURFACE OF AN IMAGE TRANSFER WEB A FIRST ELECTROSTATIC CHARGE AND A SECOND ELECTROSTATIC CHARGE OF EQUAL MAGNITUDE AND OPPOSITE POLARITY TO SAID FIRST ELECTROSTATIC CHARGE, COMPRISING IN COMBINATION: (A) A FIRST CORONA DISCHARGE DEVICE COMPRISING CORONA WIRE POSITIONED WITHIN A CONDUCTIVE SHIELD; (B) A SECOND CORONA DISCHARGE DEVICE COMPRISING CORONA WIRE POSITIONED WITHIN A CONDUCTIVE SHIELD; AND, (C) AN ELECTRICALLY ISOLATED HIGH VOLTAGE POWER SUPPLY; SAID CORONA WIRES OF SAID CORONA DISCHARGE DEVICES BEING RESPECTIVELY CONNECTED TO OPPOSITELY POLED TERMINALS OF SAID POWER SUPPLY, SAID CONDUCITVE SHIELDS, BEING ELECTRICALLY CONNECTED, SAID COMBINATION OF SAID CORONA DISCHARGE DEVICES AND SAID POWER SUPPLY BEING ELECTRICALLY ISOLATED FROM ITS ENVIRONMENT, AND SAID CORONA DISCHARGE DEVICES BEING DISPOSED SO THAT SUCCESSIVE AREAS OF SAID WEB ARE BROUGHT INTO OPERATIVE PROXIMITY WITH SAID FIRST CORONA DISCHARGE DEVICE AND SAID SECOND CORONA DISCHARGE DEVICE RESPECTIVELY.
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |