US2914403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing
Assignee: RCA Corp
•
Filing: 1955-05-17
•
Granted: 1959-11-24
•
Expires: 1975-05-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Meyer L Sugarman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:01
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A METHOD OF ELECTROSTATIC PRINTING COMPRISING THE STEPS OF PRODUCING A FIRST LATENT ELECTROSTATIC IMAGE ON A PHOTOCONDUCING INSULATING SURFACE, EVELOPING SAID FIRST LATENT ELECTROSTATIC IMAGE WITH A FINELY-DIVIDED DEVELOPER POWDER THEREBY FORMING A FIRST VISIBLE POWDER IMAGE ON SAID SURFACE, UNIFORMLY EXPOSING SAID SURFACE BEARING SAID FIRST VISIBLE POWDER IMAGE TO LIGHT TO WHICH SAID SURFACE IS SENSITIVE TO SUBSTANTIALLY DISCHARGE THE ELECTROSTATIC CHARGES REMAINING ON SAID SURFACE AFTER PRODUCING SAID FIRST LATENT ELECTROSTATIC IMAGE WHILE LEAVING SAID FIRST VISIBLE POWDER IMAGE SUBSTANTIALLY INDISTURBED AND ADHERING TO SAID SURFACE, EXPOSING SAID SURFACE BEARING SAID FIRST VISIBLE POWDER IMAGE THEREON TO A CORONA DISCHARGE TO PRODUCE A SECOND LATENT ELECTROSTATIC IMAGE THEREON IN REVERSE CONFIGURATION WITH RESPECT TO SAID FIRST LATENT ELECTROSTATIC IMAGE BUT HAVING THE SAME POLARITY OF CHANGE AS SAID FIRST LATENT ELECTROSTATIC IMAGE, REMOV-
Claim 2
Independent Claim
137 words
A METHOD OF ELECTROSTATIC PRINTING COMPRISING THE STEPS OF PRODUCING A FIRST LATENT ELECTROSTATIC IMAGE ON A PHOTOCONDUCING INSULATING SURFACE, EVELOPING SAID FIRST LATENT ELECTROSTATIC IMAGE WITH A FINELY-DIVIDED DEVELOPER POWDER THEREBY FORMING A FIRST VISIBLE POWDER IMAGE ON SAID SURFACE, UNIFORMLY EXPOSING SAID SURFACE BEARING SAID FIRST VISIBLE POWDER IMAGE TO LIGHT TO WHICH SAID SURFACE IS SENSITIVE TO SUBSTANTIALLY DISCHARGE THE ELECTROSTATIC CHARGES REMAINING ON SAID SURFACE AFTER PRODUCING SAID FIRST LATENT ELECTROSTATIC IMAGE WHILE LEAVING SAID FIRST VISIBLE POWDER IMAGE SUBSTANTIALLY INDISTURBED AND ADHERING TO SAID SURFACE, EXPOSING SAID SURFACE BEARING SAID FIRST VISIBLE POWDER IMAGE THEREON TO A CORONA DISCHARGE TO PRODUCE A SECOND LATENT ELECTROSTATIC IMAGE THEREON IN REVERSE CONFIGURATION WITH RESPECT TO SAID FIRST LATENT ELECTROSTATIC IMAGE BUT HAVING THE SAME POLARITY OF CHANGE AS SAID FIRST LATENT ELECTROSTATIC IMAGE, REMOV-
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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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |