US3318698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xeroprinting reproduction
Assignee: Xerox Corp
•
Filing: 1963-05-03
•
Granted: 1967-05-09
•
Expires: 1983-05-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Schwertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:14
CPC Classifications
G; G03; G03G; G03G16/00; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03G5/00; G03G5/02; G03G5/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF COPY REPRODUCTION COMPRISING THE STEPS OF: (A) APPLYING ELECTROSTATIC CHARGE TO AN IMAGE-BEARING SURFACE OF A DIELECTRIC LAYER WHILE SUPPORTED ON AN ELECTRICALLY CONDUCTIVE SUBSTRATE, WHEREIN THE IMAGE COMPRISES A FROSTED LIGHT DIFFUSING PATTERN IN THE FORM OF MICROSOPICALLY FORMED ALTERNATING RIDGES AND VALLEYS IN THE OTHERWISE SMOOTH DIELECTRIC SURFACE; (B) DEVELOPING THE ELECTROSTATIC FIELD ON SAID CHARGED SURFACE BY PASSING A QUANTITY OF ELECTROSCOPIC DEVELOPER PARTICLES THEREOVER TO DEPOSIT THEREON IN ACCORDANCE WITH ELECROSTATIC FIELD GRADIENTS; AND, (C) TRANSFERRING THE DEPOSITED POWDER FROM THE DIELECTRIC SURFACE TO A SECONDARY SUPPORT SURFACE.
Claim 2
Independent Claim
95 words
A METHOD OF COPY REPRODUCTION COMPRISING THE STEPS OF: (A) APPLYING ELECTROSTATIC CHARGE TO AN IMAGE-BEARING SURFACE OF A DIELECTRIC LAYER WHILE SUPPORTED ON AN ELECTRICALLY CONDUCTIVE SUBSTRATE, WHEREIN THE IMAGE COMPRISES A FROSTED LIGHT DIFFUSING PATTERN IN THE FORM OF MICROSOPICALLY FORMED ALTERNATING RIDGES AND VALLEYS IN THE OTHERWISE SMOOTH DIELECTRIC SURFACE; (B) DEVELOPING THE ELECTROSTATIC FIELD ON SAID CHARGED SURFACE BY PASSING A QUANTITY OF ELECTROSCOPIC DEVELOPER PARTICLES THEREOVER TO DEPOSIT THEREON IN ACCORDANCE WITH ELECROSTATIC FIELD GRADIENTS; AND, (C) TRANSFERRING THE DEPOSITED POWDER FROM THE DIELECTRIC SURFACE TO A SECONDARY SUPPORT SURFACE.
References Cited (Backward Citations)
US2618552A
Cited
US2970906A
Cited
US2857290A
Cited
US3041167A
Cited
US3118787A
Cited
FR1325193A
Cited
US3196011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |