US2808328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for xerographic reproduction
Assignee: Individual
•
Filing: 1950-07-15
•
Granted: 1957-10-01
•
Expires: 1970-07-15
Abstract
No abstract record available.
Inventors
- 👤 Carlyle W Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:01
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/01; G03G15/0142; G03G15/22; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF MAKING A PICTORIAL RECORD WHICH COMPRISES PROJECTING A LIGHT IMAGE ONTO A PHOTOELECURIC MATRIX THROUGH A TRANSPARENT ELECTRICALLY CONDUCTING PLATE, WHICH IS AT ONE SIDE OF SAID MATRIX, AND OPERAIVELY RELATED THERETO TO PRODUCE AN ELECTRICAL CHARGE-IMAGE ON THE MATRIX CORRESPONDING TO SAID LIGHT IMAGE, AND SIMULTANEOUSLY DIRECTING PERIVOUSLY ELECTRICALLY-CHARGED MARKING PARTICLES WHICH ARE SUSPENDED IN A GASEOUS ATMOSPHERE AT THE OPPOSISTE SIDE OF SAID MATRIX AND INTO THE ELECTRICAL FIELD OF THE MATRIX WHEREBY TO BUILD UP ON THE OPPOSITE SIDE OF THE MATRIX A REPRODUCTION OF LIGHT IMAGE AND TO CONTINUALLY DRAIN THE CHARGE AWAY FROM THE ILLUMINATED AREAS TO THE MATRIX.
Claim 2
Independent Claim
107 words
THE METHOD OF MAKING A PICTORIAL RECORD WHICH COMPRISES PROJECTING A LIGHT IMAGE ONTO A PHOTOELECURIC MATRIX THROUGH A TRANSPARENT ELECTRICALLY CONDUCTING PLATE, WHICH IS AT ONE SIDE OF SAID MATRIX, AND OPERAIVELY RELATED THERETO TO PRODUCE AN ELECTRICAL CHARGE-IMAGE ON THE MATRIX CORRESPONDING TO SAID LIGHT IMAGE, AND SIMULTANEOUSLY DIRECTING PERIVOUSLY ELECTRICALLY-CHARGED MARKING PARTICLES WHICH ARE SUSPENDED IN A GASEOUS ATMOSPHERE AT THE OPPOSISTE SIDE OF SAID MATRIX AND INTO THE ELECTRICAL FIELD OF THE MATRIX WHEREBY TO BUILD UP ON THE OPPOSITE SIDE OF THE MATRIX A REPRODUCTION OF LIGHT IMAGE AND TO CONTINUALLY DRAIN THE CHARGE AWAY FROM THE ILLUMINATED AREAS TO THE MATRIX.
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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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |