US3013890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of developing electrostatic images and composition therefor
Assignee: Xerox Corp
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Filing: 1958-07-08
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Granted: 1961-12-19
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Expires: 1978-07-08
Abstract
No abstract record available.
Inventors
- 👤 William E Bixby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G9/00; G03G9/08; G03G9/10; G03G9/103; G03G9/107
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
A PROCESS FOR DEVELOPING AN ELECTROSTATIC IMAGE ON AN INSULATING SURFACE COMPRISING BRINGING TO SAID INSULATING SURFACE A SOLID SURFACE HAVING ELECTROSTATICALLY COATED THEREON POSITIVELY AND NEGATIVELY CHARGED POWDER PARTICLES HAVING A PARTICLE SIZE ON THE AVERAGE LESS THAN ABOUT 20 MICRONS WHEREBY SAID POSITIVELY AND NEGATIVELY CHARGED POWDER PARTICLES CONTACT SAID INSULATING SURFACE AND ARE ELECTROSTATICALLY ATTRACTED FROM THE SURFACE BEARING SAID POWDER PARTICLES TO DEPOSIT ON SAID INSULATING SURFACE IN CONFORMITY WITH ELECTROSTATIC LINES OF FORCE OF SAID ELECTROSTATIC IMAGE.
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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) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |