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Patent US3400656A successfully refreshed from Google Patents.
US3400656A
Expired / Lapsed
US
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Electrostatic duplicator for reproducing an image from electrical charge retaining ink particles fixed in place
Assignee: Borg Warner Corp
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Filing: 1966-01-26
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Granted: 1968-09-10
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Expires: 1986-01-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Thourson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:49
CPC Classifications
G; G03; G03G; G03G17/00; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN A METHOD FOR PRODUCING COPIES FROM A MASTER HAVING IMPRINTED THEREON A FIRST IMAGE WITH ELECTRICAL CHARGE RETAINING INK, THE STEPS COMPRISING APPLYING AN ELECTRICAL CHARGE TO THE IMAGE ON THE MASTER, PRESSING ONE SURFACE OF A COPY SHEET OF DIELECTRIC MATERIAL INTO JUXTAPOSED RELATIONSHIP WITH THE MASTER, THE IMAGE ON THE ORIGINAL BEING DISPOSED BETWEEN THE ORIGINAL AND COPY SHEET, AND
Claim 2
Dependent Claim
63 words
IN A METHOD FOR PRODUCING COPIES FROM A MASTER HAVING IMPRINTED THEREON A FIRST IMAGE WITH ELECTRICAL CHARGE RETAINING INK, THE STEPS COMPRISING APPLYING AN ELECTRICAL CHARGE TO THE IMAGE ON THE MASTER, PRESSING ONE SURFACE OF A COPY SHEET OF DIELECTRIC MATERIAL INTO JUXTAPOSED RELATIONSHIP WITH THE MASTER, THE IMAGE ON THE ORIGINAL BEING DISPOSED BETWEEN THE ORIGINAL AND COPY SHEET, AND
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |