US3278439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer mix
Assignee: AB Dick Co
•
Filing: 1963-09-10
•
Granted: 1966-10-11
•
Expires: 1983-09-10
Abstract
No abstract record available.
Inventors
- 👤 Blanchette Robert George
- 👤 Loren E Shelffo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:00
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/08; G03G13/09; G03G9/00; G03G9/08; G03G9/10; G03G9/107; G03G9/1075; G03G9/108; G03G9/1087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A DEVELOPER MIX FOR DEVELOPING A VISIBLE IMAGE ON AN ELECTROPHOTOGRAPHIC MEMBER HAVING AN ELECTROSALTIC CHARGE PATTERN THEREON, SAID MIX COMPRISING A GRANULAR MASS OF 1 PART OF ELECTROSCOPIC THEROPLASTIC POWDER IN PHYSICAL MIXTURE WITH FROM 5 TO 50 PARTS OF MAGNETICALLY ATTRACTABLE CARRIER PARTICLES, SAID CARRIER PARTICLES HAVING IRREGULARLY SHAPED MAIN BODY PORTIONS OF FOIL-LIKE THICKNES IN THE RANGE FROM ABOUT 3 TO 20 MICRONS, SAID MAIN BODY PORTIONS HAVING FISSURED, DENTED, AND PITTED SURFACES AND PROTRUSIONS EXTENDING FROM SAID MAIN BODY PORTION
Claim 2
Dependent Claim
84 words
A DEVELOPER MIX FOR DEVELOPING A VISIBLE IMAGE ON AN ELECTROPHOTOGRAPHIC MEMBER HAVING AN ELECTROSALTIC CHARGE PATTERN THEREON, SAID MIX COMPRISING A GRANULAR MASS OF 1 PART OF ELECTROSCOPIC THEROPLASTIC POWDER IN PHYSICAL MIXTURE WITH FROM 5 TO 50 PARTS OF MAGNETICALLY ATTRACTABLE CARRIER PARTICLES, SAID CARRIER PARTICLES HAVING IRREGULARLY SHAPED MAIN BODY PORTIONS OF FOIL-LIKE THICKNES IN THE RANGE FROM ABOUT 3 TO 20 MICRONS, SAID MAIN BODY PORTIONS HAVING FISSURED, DENTED, AND PITTED SURFACES AND PROTRUSIONS EXTENDING FROM SAID MAIN BODY PORTION
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |