US3859303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiro(indoline-2,5'-pyrazoline)derivatives
Assignee: Fujifilm Holdings Corp
•
Filing: 1972-08-01
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Granted: 1975-01-07
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Expires: 1992-08-01
Abstract
Abstract Spiro-pyrazoline derivatives of the general formula WHERE Z1, Z2, R1 to R4 are as defined hereinafter and methods for their preparation are disclosed. The compounds are useful as organic photoconductors, organic fluorescent materials and as additives for silver salt and non-silver salt photographic materials.
Inventors
- 👤 Harumi Katsuyama
- 👤 Hisatake Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:18
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/08; G; G03; G03C; G03C1/00; G03C1/685; G03C1/76; G03C1/815; G03C1/8155; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/065
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
6 words
A SPIRO-PYRAZOLINE DERIVATIVE HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A SPIRO-PYRAZOLINE DERIVATIVE HAVING THE FORMULA
Claim 3
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 4
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 5
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 6
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 7
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 8
Dependent Claim
10 words
the spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 9
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 10
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 11
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
Claim 12
Dependent Claim
10 words
The spiro-pyrazoline derivative of claim 1 wherein said derivative is
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |