US3257322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner for electroradiography
Assignee: Research Laboratories of Australia Pty Ltd
•
Filing: 1963-08-06
•
Granted: 1966-06-21
•
Expires: 1983-08-06
Abstract
No abstract record available.
Inventors
- 👤 Robert J Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:37
CPC Classifications
C; C09; C09D; C09D11/00; C09D7/00; C09D7/80; G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/125; G03G9/13; G03G9/135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
IN A METHOD OF PREPARING A SUBSTANTIALLY BLACK DEVELOPER OF POSITIVE POLARITY FOR THE DEVELOPMENT OF ELECTROSTATIC IMAGES: PREPARING A VARNISH CONSISTING ESSENTIALLY OF HEATING ABOUT ONE PART BY WEIGHT HYDROGENATED ROSIN IN THE PRESENCE OF ABOUT FOUR PARTS BY WEIGHT OF POLYMERIZED LINSEED OIL HAVING A VISCOSITY OF ABOUT 7.0-9.5 POISES AND AT A TEMPERATURE OF ABOUT 235*F. FOR ABOUT ONE-HALF HOUR UNTIL SOLUTION IS COMPLETE; ADDING TO THE VARNISH A TONER CONSISTING ESSENTIALLY OF CARBON BLACK IN A PREDOMINATING AMOUNT AND BLUE PIGMENT IN A MINOR AMOUNT, SAID TONER BEING PRESENT IN THE PROPORTION OF ABOUT 30 TO 40 PARTS BY WEIGHT OF TONER TO ABOUT 85 PARTS BY WEIGHT OF VARNISH, AND MILLING TO DISPERSE THE TONER IN THE VARNISH; AND SUBSEQUENTLY DISPERSING THE MEDIUM SO FORMED IN A CARRIER LIQUID IN THE PROPORTION OF ABOUT ONE PART BY WEIGHT OF MEDIUM TO ABOUT 100 PARTS BY WEIGHT OF CARRIER LIQUID, THE CARRIER LIQUID BEING A HYDROCARBON SOLVENT WITH A K.B. VALUE BETWEEN ABOUT 26 AND 93.
Claim 2
Dependent Claim
170 words
IN A METHOD OF PREPARING A SUBSTANTIALLY BLACK DEVELOPER OF POSITIVE POLARITY FOR THE DEVELOPMENT OF ELECTROSTATIC IMAGES: PREPARING A VARNISH CONSISTING ESSENTIALLY OF HEATING ABOUT ONE PART BY WEIGHT HYDROGENATED ROSIN IN THE PRESENCE OF ABOUT FOUR PARTS BY WEIGHT OF POLYMERIZED LINSEED OIL HAVING A VISCOSITY OF ABOUT 7.0-9.5 POISES AND AT A TEMPERATURE OF ABOUT 235*F. FOR ABOUT ONE-HALF HOUR UNTIL SOLUTION IS COMPLETE; ADDING TO THE VARNISH A TONER CONSISTING ESSENTIALLY OF CARBON BLACK IN A PREDOMINATING AMOUNT AND BLUE PIGMENT IN A MINOR AMOUNT, SAID TONER BEING PRESENT IN THE PROPORTION OF ABOUT 30 TO 40 PARTS BY WEIGHT OF TONER TO ABOUT 85 PARTS BY WEIGHT OF VARNISH, AND MILLING TO DISPERSE THE TONER IN THE VARNISH; AND SUBSEQUENTLY DISPERSING THE MEDIUM SO FORMED IN A CARRIER LIQUID IN THE PROPORTION OF ABOUT ONE PART BY WEIGHT OF MEDIUM TO ABOUT 100 PARTS BY WEIGHT OF CARRIER LIQUID, THE CARRIER LIQUID BEING A HYDROCARBON SOLVENT WITH A K.B. VALUE BETWEEN ABOUT 26 AND 93.
References Cited (Backward Citations)
US2348594A
Cited
US2907674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |