US3203394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic development apparatus
Assignee: Xerox Corp
•
Filing: 1962-10-01
•
Granted: 1965-08-31
•
Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 William D Hope
- 👤 Snelling Christopher
- 👤 Paul F King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:12
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0818
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
DEVELOPING APPARATUS FOR THE DEVELOPMENT OF ELECTROSTATIC IMAGES PREVIOUSLY FORMED ON AN IMAGE-BEARING SURFACE COMPRISING IN COMBINATION: (A) A DONOR MEMBER CAPABLE OF RETAINING A CONTROLLED QUANTITY OF ELECTROSCOPIC MARKING PARTICLES ALONG ONE SURFACE THEREOF, SAID DONOR MEMBER COMPRISING:: (1) AN ELECTRICALLY CONDUCTIVE SUPPORT BASE; AND, (2) AT LEAST TWO SEPARATE ELECTICALLY DIFFERENT MATERIAL ELEMENTS, AT LEAST ONE OF WHICH ELECTRICAL REACTERIZED BY SUBSTANTIALLY HIGHER ELECTRICAL RESISTIVITY THAN OTHERS OF SAID ELEMENTS AND ARRANGED COMBINED RELATIVE TO EACH OTHER IN A STRUCTURALLY DISTINCT GEOMETRIC CONFIGURATION OVERLYING SAID BASE AND ADAPTED TO EFFECT A SURFACE CHARGE RETENTION PATTERN CORRELATED TO SAID CONFIGURATION TO RETAIN CHARGE PREDOMINANTY IN THE AREAS OF THE HIGHER RESISTIVITY ELEMENTS.
Claim 2
Dependent Claim
113 words
DEVELOPING APPARATUS FOR THE DEVELOPMENT OF ELECTROSTATIC IMAGES PREVIOUSLY FORMED ON AN IMAGE-BEARING SURFACE COMPRISING IN COMBINATION: (A) A DONOR MEMBER CAPABLE OF RETAINING A CONTROLLED QUANTITY OF ELECTROSCOPIC MARKING PARTICLES ALONG ONE SURFACE THEREOF, SAID DONOR MEMBER COMPRISING:: (1) AN ELECTRICALLY CONDUCTIVE SUPPORT BASE; AND, (2) AT LEAST TWO SEPARATE ELECTICALLY DIFFERENT MATERIAL ELEMENTS, AT LEAST ONE OF WHICH ELECTRICAL REACTERIZED BY SUBSTANTIALLY HIGHER ELECTRICAL RESISTIVITY THAN OTHERS OF SAID ELEMENTS AND ARRANGED COMBINED RELATIVE TO EACH OTHER IN A STRUCTURALLY DISTINCT GEOMETRIC CONFIGURATION OVERLYING SAID BASE AND ADAPTED TO EFFECT A SURFACE CHARGE RETENTION PATTERN CORRELATED TO SAID CONFIGURATION TO RETAIN CHARGE PREDOMINANTY IN THE AREAS OF THE HIGHER RESISTIVITY ELEMENTS.
References Cited (Backward Citations)
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US2880699A
Cited
US3011473A
Cited
US3093039A
Cited
US3013890A
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US3049968A
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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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |