Patent US3772199A successfully refreshed from Google Patents.
US3772199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid developer used for electrophotography
Assignee: Fujifilm Holdings Corp
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Filing: 1971-11-11
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Granted: 1973-11-13
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Expires: 1991-11-11
Abstract
Abstract A LIQUID DEVELOPER FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE COMPRISING A CARRIER LIQUID HAVING MORE THAN 10**11$ CM. OF SPECIFIC RESISTANCE, TONER PARTICLES WHICH ARE INSOLUBLE IN SAID CARRIER LIQUID, 1-HYDROXYALKYL-2-HIGHER ALKYL-2-IMIDAZOLINE WHICH IS SOLUBLE IN THE CARRIER LIQUID AND A COPOLYMER OF HALF-ALKYLAMIDE OF MALEIC ACID AND DIISOBUTYLENE WHICH IS SOLUBLE IN THE CARRIER LIQUID IS DISCLOSED.
Inventors
- 👤 Y Tamai
- 👤 S Osawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:23
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/135; G03G9/13; G03G9/131
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |