Patent US3749670A successfully refreshed from Google Patents.
US3749670A
Expired / Lapsed
US
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Electrostatic liquid developer containing dye coated carbon particles
Assignee: AB Dick Co
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Filing: 1970-04-17
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Granted: 1973-07-31
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Expires: 1990-04-17
Abstract
Abstract NEW AND IMPROVED TONER PARTICLES FOR USE IN A LIQUID DEVELOPING COMPOSITION FOR CONVERTING A LATENT ELECTROSTATIC IMAGE TO A VISIBLE IMAGE AND METHOD FOR THEIR PREPATATION WHEREIN CARBON PIGMENT MATERIAL IS TREATED WITH A DYE CARRYING A POSITIVE ELECTROSTATIC CHARGE DISSOLVED IN A POLAR ORGANIC SOLVENT.
Inventors
- 👤 M Ormsbee
- 👤 M Saadeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:06
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |