Patent US2965573A successfully refreshed from Google Patents.
US2965573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic developer
Assignee: Xerox Corp
•
Filing: 1958-05-02
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Granted: 1960-12-20
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Expires: 1978-05-02
Abstract
No abstract record available.
Inventors
- 👤 Robert W Gundlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:15
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A XEROGRAPHIC DEVELOPER FOR ELECTROSTATIC LATENT IMAGES COMPRISING, IN MIXTURE, A FIRST COMPONENT COMPRISING GRANULAR CARRIER PARTICLES HAVING A SIZE RANGE OF FROM 20 TO 200 MESH, A SECOND COMPONENT COMPRISING FILAMENTARY ELECTRICALLY CONDUCTIVE PARTICLES HAVING A LENGTH IN THE RANGE OF FROM ABOUT 1/16 INCH TO ABOUT 3/4 INCH AND HAVING DIAMETERS IN THE RANGE OF ABOUT FROM 1 TO 20 MILS, AND A THIRD COMPONENT COMPRISING PIGMENTED TONER POWDER PARTICLES NO LARGER THAN ABOUT 20 MICRONS, EACH OF EACH AND SAID SECOND COMPONENTS BEING TRIBOELECTRICALLY DIFFERENT FROM SAID THIRD COMPONENT AND EACH HAVING A TRIBOELECTRIC RELATIONSHIP OF LIKE POLARITY WITH RESPECT TO SAID THIRD COMPONENT AND SAID SECOND COMPONENT HAVING A SUBSTANTIALLY MENTRAL TRIBOELECTRIC RELATIONSHIP WITH RESPECT TO SAID FIRST COMPONENT, A DEVELOPER MIXTURE COMPRISING ONE PART OF SAID THIRD COMPONENT TO 20 TO 200 PARTS OF SAID FIRST COMPONENT AND THE FIRST AND THIRD COMPONENT MIXTURE COMPRISING ABOUT 100 PARTS TO ABOUT 5 TO 150 PARTS OF SAID SECOND COMPONENT.
Claim 2
Dependent Claim
163 words
A XEROGRAPHIC DEVELOPER FOR ELECTROSTATIC LATENT IMAGES COMPRISING, IN MIXTURE, A FIRST COMPONENT COMPRISING GRANULAR CARRIER PARTICLES HAVING A SIZE RANGE OF FROM 20 TO 200 MESH, A SECOND COMPONENT COMPRISING FILAMENTARY ELECTRICALLY CONDUCTIVE PARTICLES HAVING A LENGTH IN THE RANGE OF FROM ABOUT 1/16 INCH TO ABOUT 3/4 INCH AND HAVING DIAMETERS IN THE RANGE OF ABOUT FROM 1 TO 20 MILS, AND A THIRD COMPONENT COMPRISING PIGMENTED TONER POWDER PARTICLES NO LARGER THAN ABOUT 20 MICRONS, EACH OF EACH AND SAID SECOND COMPONENTS BEING TRIBOELECTRICALLY DIFFERENT FROM SAID THIRD COMPONENT AND EACH HAVING A TRIBOELECTRIC RELATIONSHIP OF LIKE POLARITY WITH RESPECT TO SAID THIRD COMPONENT AND SAID SECOND COMPONENT HAVING A SUBSTANTIALLY MENTRAL TRIBOELECTRIC RELATIONSHIP WITH RESPECT TO SAID FIRST COMPONENT, A DEVELOPER MIXTURE COMPRISING ONE PART OF SAID THIRD COMPONENT TO 20 TO 200 PARTS OF SAID FIRST COMPONENT AND THE FIRST AND THIRD COMPONENT MIXTURE COMPRISING ABOUT 100 PARTS TO ABOUT 5 TO 150 PARTS OF SAID SECOND COMPONENT.
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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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |