US2701764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic apparatus and methods
Assignee: Individual
•
Filing: 1951-05-02
•
Granted: 1955-02-08
•
Expires: 1971-05-02
Abstract
No abstract record available.
Inventors
- 👤 Chester F Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
ELECTROPHOTOGRAPHIC APPARATUS COMPRISING, IN COMBINATION, A FIRST CHARGING DEVICE AND A SECOND CHARGING DEVICE, PLATE SUPPORT AND TRANSPORT MEANS TO SUPPORT AN ELECTROPHOTOGRAPHIC PLATE AND MOVE SAID PLATE IN A PATH SUBSTANTIALLY PARALLEL TO ITS PHOTOCONDUCTIVE SURFACE UNDER SAID FIRST CHARGING DEVICE AND SUBSEQUENTLY UNDER SAID SECOND CHARGING DEVICE, SAID FIRST CHARGING DEVICE BEING CAPABLE OF EFFECTING RAPID CHARGING OF SAID PLATE SURFACE, AND SAID SOURCE AND A POTENTIAL SOURCE FOR CREATING ALPHA PARTICLE SOURCE A POTENTIAL SOURCE FOR CREATING AN ELECTRIC FIELD FROM THE VICINITY OF THE IONIZATION PRODUCED BY SAID ALPHA SOURCE TO THE PHOTO-CONDUCTIVE SURFACE OF SAID PLATE.
Claim 2
Dependent Claim
101 words
ELECTROPHOTOGRAPHIC APPARATUS COMPRISING, IN COMBINATION, A FIRST CHARGING DEVICE AND A SECOND CHARGING DEVICE, PLATE SUPPORT AND TRANSPORT MEANS TO SUPPORT AN ELECTROPHOTOGRAPHIC PLATE AND MOVE SAID PLATE IN A PATH SUBSTANTIALLY PARALLEL TO ITS PHOTOCONDUCTIVE SURFACE UNDER SAID FIRST CHARGING DEVICE AND SUBSEQUENTLY UNDER SAID SECOND CHARGING DEVICE, SAID FIRST CHARGING DEVICE BEING CAPABLE OF EFFECTING RAPID CHARGING OF SAID PLATE SURFACE, AND SAID SOURCE AND A POTENTIAL SOURCE FOR CREATING ALPHA PARTICLE SOURCE A POTENTIAL SOURCE FOR CREATING AN ELECTRIC FIELD FROM THE VICINITY OF THE IONIZATION PRODUCED BY SAID ALPHA SOURCE TO THE PHOTO-CONDUCTIVE SURFACE OF SAID PLATE.
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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) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |