US2997387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic reproduction
Assignee: Ozalid Co Ltd
•
Filing: 1958-12-15
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Granted: 1961-08-22
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Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Arnold Tanenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:29
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0557; G03G5/0575; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD OF XEROGRAPHY WHICH COMPRISES THE STEPS OF ELECTROSTATICALLY CHARGING A PLATE HAVING THEREON A PHOTOCONDUCTIVE INSULATING SUBSTANCE IN A CONDENSED IRREVERSIBLY WATER-INSOLUBLE AMINE-FORMALDEHYDE RESIN APPLIED BY FORMING AN AQUEOUS COMPOSITION CONSISTING ESSENTIALLY OF A PHOTOCONDUCTIVE INSULATING SUBSTANCE AND A WATER SOLUBLE AMINOPLAST WHICH IS THE CONDENSATION PRODUCT OF AN AMINE AND FORMALDEHYDE, APPLYING SAID COMPOSITION TO A SUPPORT TO FORM A COATING LAYER THEREON, REMOVING WATER FROM SAID LAYER AND CONDENSING THE SAID AMINOPLAST TO AN IRREVERSIBLY WATER-INSOLUBLE RESIN, EXPOSING SAID CHARGED PLATE TO A LIGHT IMAGE TO FORM A LATENT ELECTROSTATIC IMAGE AND DEVELOPING AND FIXING SAID LATENT IMAGE.
Claim 2
Independent Claim
102 words
THE METHOD OF XEROGRAPHY WHICH COMPRISES THE STEPS OF ELECTROSTATICALLY CHARGING A PLATE HAVING THEREON A PHOTOCONDUCTIVE INSULATING SUBSTANCE IN A CONDENSED IRREVERSIBLY WATER-INSOLUBLE AMINE-FORMALDEHYDE RESIN APPLIED BY FORMING AN AQUEOUS COMPOSITION CONSISTING ESSENTIALLY OF A PHOTOCONDUCTIVE INSULATING SUBSTANCE AND A WATER SOLUBLE AMINOPLAST WHICH IS THE CONDENSATION PRODUCT OF AN AMINE AND FORMALDEHYDE, APPLYING SAID COMPOSITION TO A SUPPORT TO FORM A COATING LAYER THEREON, REMOVING WATER FROM SAID LAYER AND CONDENSING THE SAID AMINOPLAST TO AN IRREVERSIBLY WATER-INSOLUBLE RESIN, EXPOSING SAID CHARGED PLATE TO A LIGHT IMAGE TO FORM A LATENT ELECTROSTATIC IMAGE AND DEVELOPING AND FIXING SAID LATENT IMAGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |