Patent US3333958A successfully refreshed from Google Patents.
US3333958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic developing
Assignee: RCA Corp
•
Filing: 1964-03-27
•
Granted: 1967-08-01
•
Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward C Giaimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:24
CPC Classifications
G; G03; G03G; G03G16/00; G03G5/00; G03G5/02; G03G5/022; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A METHOD OF DEVELOPING AN ELECTROPHOTOGRAPHIC RECORD ELEMENT OF THE TYPE COMPRISING AN ELECTRICALLY CONDUCTIVE LAYER AND A THERMOPLASTIC PHOTOCONDUCTIVE LAYER THEREON, AND WHEREIN A CONDUCTIVITY PATTERN IS PRODUCED IN SAID PHOTOCONDUCTIVE LAYER, THE IMPROVEMENT COMPRISING (A) APPLYING HEAT TO SAID PHOTOCONDUCTIVE LAYER HAVING SAID CONDUCTIVITY PATTERN THEREIN, AND (B) CHARGING SAID PHOTOCONDUCTIVE LAYER PERIODICALLY WITH AN ELECTROSTATIC CHARGE IN PULSES DURING AT LEAST A PORTION OF THE TIME SAID HEAT IS APPLIED TO SAID PHOTOCONDUCTIVE LAYER TO REPLENISH ANY ELECTROSTATIC CHARGE DISSIPATED BY SAID HEAT, WHEREBY TO ALLOW ELECTROSTATIC CHARGES TO DEFORM SAID LAYER AND TO PRODUCE A RIPPLE IMAGE THEREIN.
Claim 2
Dependent Claim
103 words
IN A METHOD OF DEVELOPING AN ELECTROPHOTOGRAPHIC RECORD ELEMENT OF THE TYPE COMPRISING AN ELECTRICALLY CONDUCTIVE LAYER AND A THERMOPLASTIC PHOTOCONDUCTIVE LAYER THEREON, AND WHEREIN A CONDUCTIVITY PATTERN IS PRODUCED IN SAID PHOTOCONDUCTIVE LAYER, THE IMPROVEMENT COMPRISING (A) APPLYING HEAT TO SAID PHOTOCONDUCTIVE LAYER HAVING SAID CONDUCTIVITY PATTERN THEREIN, AND (B) CHARGING SAID PHOTOCONDUCTIVE LAYER PERIODICALLY WITH AN ELECTROSTATIC CHARGE IN PULSES DURING AT LEAST A PORTION OF THE TIME SAID HEAT IS APPLIED TO SAID PHOTOCONDUCTIVE LAYER TO REPLENISH ANY ELECTROSTATIC CHARGE DISSIPATED BY SAID HEAT, WHEREBY TO ALLOW ELECTROSTATIC CHARGES TO DEFORM SAID LAYER AND TO PRODUCE A RIPPLE IMAGE THEREIN.
References Cited (Backward Citations)
US3113179A
Cited
US3108893A
Cited
BE612087A
Cited
US3055006A
Cited
US3196011A
Cited
US3238041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |