US3106479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing method and apparatus
Assignee: RCA Corp
•
Filing: 1952-12-03
•
Granted: 1963-10-08
•
Expires: 1972-12-03
Abstract
No abstract record available.
Inventors
- 👤 John E Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF ELECTROSTATIC PRINTING COMPRISING DEVELOPING, UPON A FIRST SURFACE, A LATENT ELECTROSTATIC IMAGE WITH A DRY, ELECTRICALLY CHARGED MAGNETIC POWDER TO PRODUCE ON SAID FIRST SURFACE A VISIBLE POWDER IMAGE, BRINGING A SECOND SURFACE INTO CONTACT WITH SAID VISIBLE POWDER IMAGE AND WHILE MAINTAINING SAID CONTACT TRANSFERRING SAID VISIBLE POWDER IMAGE FROM SAID FIRST SURFACE TO SAID SECOND SURFACE BY APPLYING A MAGNETIC FIELD HAVING AT LEAST A SUBSTANTIAL COMPONENT IN A DIRECTION PERPENDICULAR TO
Claim 2
Independent Claim
77 words
THE METHOD OF ELECTROSTATIC PRINTING COMPRISING DEVELOPING, UPON A FIRST SURFACE, A LATENT ELECTROSTATIC IMAGE WITH A DRY, ELECTRICALLY CHARGED MAGNETIC POWDER TO PRODUCE ON SAID FIRST SURFACE A VISIBLE POWDER IMAGE, BRINGING A SECOND SURFACE INTO CONTACT WITH SAID VISIBLE POWDER IMAGE AND WHILE MAINTAINING SAID CONTACT TRANSFERRING SAID VISIBLE POWDER IMAGE FROM SAID FIRST SURFACE TO SAID SECOND SURFACE BY APPLYING A MAGNETIC FIELD HAVING AT LEAST A SUBSTANTIAL COMPONENT IN A DIRECTION PERPENDICULAR TO
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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) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |