US2705199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of developing an electrostatic latent image
Assignee: Individual
•
Filing: 1951-09-12
•
Granted: 1955-03-29
•
Expires: 1971-09-12
Abstract
No abstract record available.
Inventors
- 👤 Harold E Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:01
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0801
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF DEVELOPING AN ELECTROSTATIC LATENT IMAGE ON A LONG PLANE IMAGE BEARING SURFACE COMPRISING POSITIONING THE IMAGE BEARING SURFACE LENGTHWISE ON AN INCLINE OF AT LEAST 30 DEGREES AND CONTINUOUSLY FEEDING ADDITIONAL INCREMENTS OF A DEVELOPER FROM A SOURCE OF SUPPLY MOVING RELATIVELY ALONG THE IMAGE-BEARING SURFACE TO THE SURFACE IN A TRAVELLING LOCATION, BEGINNING AT THE TOP OF THE INCLINE AND ENDING AT THE BOTTOM OF THE INCLINE, SAID DEVELOPER CONSISTING OF GRANULAR CARRIER PARTICLES AND OPPOSITELY CHARGED ELECTROSCOPIC POWDER PARTICLES WHEREIN IN POWDER PARTICLES ARE CHARGED TO A POLARITY OPPOSITE TO THE POLARITY OF THE ELECTROSTATIC LATENT IMAGE, WHEREBY THE ELECTROSCOPIC PARTICLES ARE DEPOSITED ON THE IMAGE BEARING SURFACE IN CONFORMITY WITH THE ELECTROSTATIC LATENT IMAGE TO YIELD A DEVELOPED IMAGE SUBSTANTIALLY FREE FROM END TO END NON-UNIFORMITY.
Claim 2
Independent Claim
132 words
A METHOD OF DEVELOPING AN ELECTROSTATIC LATENT IMAGE ON A LONG PLANE IMAGE BEARING SURFACE COMPRISING POSITIONING THE IMAGE BEARING SURFACE LENGTHWISE ON AN INCLINE OF AT LEAST 30 DEGREES AND CONTINUOUSLY FEEDING ADDITIONAL INCREMENTS OF A DEVELOPER FROM A SOURCE OF SUPPLY MOVING RELATIVELY ALONG THE IMAGE-BEARING SURFACE TO THE SURFACE IN A TRAVELLING LOCATION, BEGINNING AT THE TOP OF THE INCLINE AND ENDING AT THE BOTTOM OF THE INCLINE, SAID DEVELOPER CONSISTING OF GRANULAR CARRIER PARTICLES AND OPPOSITELY CHARGED ELECTROSCOPIC POWDER PARTICLES WHEREIN IN POWDER PARTICLES ARE CHARGED TO A POLARITY OPPOSITE TO THE POLARITY OF THE ELECTROSTATIC LATENT IMAGE, WHEREBY THE ELECTROSCOPIC PARTICLES ARE DEPOSITED ON THE IMAGE BEARING SURFACE IN CONFORMITY WITH THE ELECTROSTATIC LATENT IMAGE TO YIELD A DEVELOPED IMAGE SUBSTANTIALLY FREE FROM END TO END NON-UNIFORMITY.
References Cited (Backward Citations)
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Cited
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US2476145A
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US2484782A
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US2539084A
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US2619552A
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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) | 1958-03-28 | 1958-09-27 | 1959-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-28 | 1962-09-27 | 1963-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-28 | 1966-09-27 | 1967-03-29 | $7700.00 | Window Closed / Lapsed |