US3438904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid toner
Assignee: SCM Corp
•
Filing: 1966-01-10
•
Granted: 1969-04-15
•
Expires: 1986-01-10
Abstract
No abstract record available.
Inventors
- 👤 Edward W Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:17
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/135; G03G9/1355; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF DEVELOPING A NEGATIVELY CHARGED LATENT ELECTROSTATIC IMAGE INTO A VISUAL IMAGE, COMPRISING THE STEPS OF: (A) APPLYING TO SAID IMAGE A SUBSTANTIALLY WATER-FREE POSITIVE ACTING DEVELOPER COMPOSITION CONSISTING ESSENTIALLY OF AN EVAPORATIVE LIQUID HYDROCARBON CARRIER HAVING A RESISTIVITY OF NOT LESS THAN ABOUT 10**10 OHM-CM; 0.00005 TO 5% BY WEIGHT OF FINELY DIVIDED, OPAQUE, INSOLUBLE, PIGMENT PARTICLES DISPERSED IN SAID CARRIER; AND A MANGANESE SALT OF AN ORGANIC ACID IN AN EFFECTIVE AMOUNT EQUAL TO NOT MORE THAN ABOUT 0.2% BY WEIGHT OF MANGANESE METAL BASED ON TOTAL DEVELOPER, FOR VISUALLY IMPROVING THE QUALITY OF THE IMAGE PRODUCED BY THE PIGMENT PARTICLES, SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF MANGANESE LINORESINATE, MANGANESE 2-ETHYLHEXOATE AND MANGANESE NAPHTHENATE, AND (B) THEREAFTER REMOVING EXCESS DEVELOPER FROM THE CARRIER BEARING THE ELECTROSTATIC IMAGE.
Claim 2
Independent Claim
134 words
THE METHOD OF DEVELOPING A NEGATIVELY CHARGED LATENT ELECTROSTATIC IMAGE INTO A VISUAL IMAGE, COMPRISING THE STEPS OF: (A) APPLYING TO SAID IMAGE A SUBSTANTIALLY WATER-FREE POSITIVE ACTING DEVELOPER COMPOSITION CONSISTING ESSENTIALLY OF AN EVAPORATIVE LIQUID HYDROCARBON CARRIER HAVING A RESISTIVITY OF NOT LESS THAN ABOUT 10**10 OHM-CM; 0.00005 TO 5% BY WEIGHT OF FINELY DIVIDED, OPAQUE, INSOLUBLE, PIGMENT PARTICLES DISPERSED IN SAID CARRIER; AND A MANGANESE SALT OF AN ORGANIC ACID IN AN EFFECTIVE AMOUNT EQUAL TO NOT MORE THAN ABOUT 0.2% BY WEIGHT OF MANGANESE METAL BASED ON TOTAL DEVELOPER, FOR VISUALLY IMPROVING THE QUALITY OF THE IMAGE PRODUCED BY THE PIGMENT PARTICLES, SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF MANGANESE LINORESINATE, MANGANESE 2-ETHYLHEXOATE AND MANGANESE NAPHTHENATE, AND (B) THEREAFTER REMOVING EXCESS DEVELOPER FROM THE CARRIER BEARING THE ELECTROSTATIC IMAGE.
References Cited (Backward Citations)
US1237136A
Cited
US1524872A
Cited
US2173445A
Cited
US2618552A
Cited
US3010842A
Cited
US2907674A
Cited
US3058914A
Cited
US3253913A
Cited
US3241957A
Cited
US3259581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |