Patent US5169987A successfully refreshed from Google Patents.
US5169987A
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Squarlylium compound
Assignee: Fujifilm Business Innovation Corp
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Filing: 1990-12-07
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Granted: 1992-12-08
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Expires: 2010-12-07
Abstract
Abstract A squarylium compound represented by formula (III) ##STR1## wherein R 4 represents a hydrogen atom, a methyl group, or a fluorine atom.
Inventors
- 👤 Yutaka Akasaki
- 👤 Akihiko Tokida
- 👤 Kaoru Torikoshi
- 👤 Tooru Ishii
- 👤 Hidemi Suto
- 👤 Akira Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:30
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0661; C; C07; C07C; C07C225/00; C07C225/22; C07C229/00; C07C229/52; C07C229/54; C07C229/66; C07C233/00; C07C233/01; C07C233/34; C07C233/42; C07C233/43; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/86; G03G5/0601; G03G5/0603; G03G5/0609; G03G5/0611; G03G5/0618; C07C2601/00; C07C2601/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A squarylium compound represented by formula (III) ##STR77## wherein R 4 represents a hydrogen atom, a methyl group, or a fluorine atom.
Claim 2
Dependent Claim
22 words
A squarylium compound represented by formula (III) ##STR77## wherein R 4 represents a hydrogen atom, a methyl group, or a fluorine atom.
References Cited (Backward Citations)
US4751327A
Cited
US5041665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |