US3223548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic developing machine and method
Assignee: Xerox Corp
•
Filing: 1963-12-19
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Granted: 1965-12-14
•
Expires: 1983-12-19
Abstract
No abstract record available.
Inventors
- 👤 Harold E Clark
- 👤 George R Mott
- 👤 Robert W Gundlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:43
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0801
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF DEVELOPING AN ELECTROSTATIC LATENT IMAGE ON A FLAT PORTION OF A XEROGRAPHIC PLATE COMPRISING POSITIONING THE FLAT PORTION WITH THE ELECTROSTATIC LATENT IMAGE FACING UPWARDS AND AT A GIVEN ANGLE SLIGHTLY GREATER THAN THE ANGLE OF REPOSE OF A GRANULAR ELECTROSTATIC IMAGE DEVELOPER ON SAID PLATE WHEN SAID PLATE IS IN AN UNCHARGED CONDITION, AND DIRECTING SAID GRANULAR ELECTROSTATIC IMAGE DEVELOPER DOWNWARDLY AGAINSTR SAID ELECTROSTATIC IMAGE SUBSTANTIALLY TANGENTIALLY THERETO AT A VELOCITY SUBSTANTIALY EQUAL TO THE TERMINAL VELOCITY THAT WOULD BE OBTAINED BY SAID GRANULAR DEVELOPER FLOWING OVER A XEROGRAPHIC PLATE OF INDEFINITE LENGTH INCLINED AT SAID GEVEN ANGLE.
Claim 2
Independent Claim
102 words
A METHOD OF DEVELOPING AN ELECTROSTATIC LATENT IMAGE ON A FLAT PORTION OF A XEROGRAPHIC PLATE COMPRISING POSITIONING THE FLAT PORTION WITH THE ELECTROSTATIC LATENT IMAGE FACING UPWARDS AND AT A GIVEN ANGLE SLIGHTLY GREATER THAN THE ANGLE OF REPOSE OF A GRANULAR ELECTROSTATIC IMAGE DEVELOPER ON SAID PLATE WHEN SAID PLATE IS IN AN UNCHARGED CONDITION, AND DIRECTING SAID GRANULAR ELECTROSTATIC IMAGE DEVELOPER DOWNWARDLY AGAINSTR SAID ELECTROSTATIC IMAGE SUBSTANTIALLY TANGENTIALLY THERETO AT A VELOCITY SUBSTANTIALY EQUAL TO THE TERMINAL VELOCITY THAT WOULD BE OBTAINED BY SAID GRANULAR DEVELOPER FLOWING OVER A XEROGRAPHIC PLATE OF INDEFINITE LENGTH INCLINED AT SAID GEVEN ANGLE.
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |