Patent US3799773A successfully refreshed from Google Patents.
US3799773A
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Electrophotographic process employing a photochromic compound and transparent toner
Assignee: Fujifilm Holdings Corp
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Filing: 1972-01-19
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Granted: 1974-03-26
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Expires: 1992-01-19
Abstract
Abstract A PROCESS FOR THE FORMATION OF TONER IMAGES WHERE AN ELECROSTATICAL IMAGE IS FORMED ON AN ELECTROPHOTOGRAPHIC SENSITIVE LAYER CONTAINING A PHOTOCHROMIC COMPOUND AND DEVELOPED WITH A TONER TO FORM A TONER IMAGE, THE TONER CONTROLLING THE COLORING OR DISCOLORING OR THE COLOR SHADE OF THE PHOTOCHROMIC COMPOUND IN THE SENSITIVE LAYER.
Inventors
- 👤 S Watarai
- 👤 H Ono
- 👤 C Osada
- 👤 S Honjo
- 👤 Y Tamai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:47
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/08; G03C; G03C1/00; G03C1/685; G03G5/00; G03G5/02; G03G5/04; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08713; G03G9/08715; G03G9/08775; G03G9/08777; G03G9/09; G03G9/0906; G03G9/091; G03G9/0918; G03G9/092; G03G9/0926; G03G9/097; G03G9/09733; G03G9/09775
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |