US3285740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic process
Assignee: GAF Chemicals Corp
•
Filing: 1961-10-25
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Granted: 1966-11-15
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Expires: 1981-10-25
Abstract
No abstract record available.
Inventors
- 👤 John W Weigl
- 👤 Alan B Amidon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:48
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0633; G03G15/00; G03G15/22; G03G5/0601; G03G5/0605; G03G5/0609; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/08; G03G5/10; G03G5/14; G03G5/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A PROCESS OF PRODUCING AN ELECTROSTATIC LATENT IMAGE ON ELECTROPHOTOGRAPHIC MATERIAL OF THE TYPE CONSISTING OF A PHOTOCONDUCTIVE LAYER ON A TRANSLUCENT INSULATING SUPPORT WHEREIN ARE EMPLOYED THE STEPS OF APPLYING A UNIFORM ELECTROSTATIC CHARGE TO A RECEPTIVE SURFACE OF THE PHOTOCONDUCTIVE LAYER OF SAID MATERIAL, OF EXPOSING SAID LAYER TO A LIGHT-IMAGE PATTERN, AND OF FINALLY DEVELOPING AND FIXING SAID IMAGE; THE IMPROVEMENT WHICH COM-
Claim 2
Dependent Claim
67 words
IN A PROCESS OF PRODUCING AN ELECTROSTATIC LATENT IMAGE ON ELECTROPHOTOGRAPHIC MATERIAL OF THE TYPE CONSISTING OF A PHOTOCONDUCTIVE LAYER ON A TRANSLUCENT INSULATING SUPPORT WHEREIN ARE EMPLOYED THE STEPS OF APPLYING A UNIFORM ELECTROSTATIC CHARGE TO A RECEPTIVE SURFACE OF THE PHOTOCONDUCTIVE LAYER OF SAID MATERIAL, OF EXPOSING SAID LAYER TO A LIGHT-IMAGE PATTERN, AND OF FINALLY DEVELOPING AND FIXING SAID IMAGE; THE IMPROVEMENT WHICH COM-
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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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |