US4730902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared absorbent
Assignee: Fujifilm Corp
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Filing: 1986-08-13
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Granted: 1988-03-15
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Expires: 2006-08-13
Abstract
Abstract An infrared absorbent comprising a metal complex compound prepared by coordinating a thiorato bidentate ligand and a nitrogen-containing bindentate ligand to a center metal. With use of the infrared absorbent, there is provided an infrared absorbing material capable of absorbing a far-infrared or near-infrared light having a wavelength of 700 nm or more, which has a high transmittance of a visible light and a good fastness to heat and light. The infrared absorbing material can be used for an infrared absorbing material such as an optical filter or other various objects.
Inventors
- 👤 Yoshiaki Suzuki
- 👤 Gouichi Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/04; C07F15/045; C07F15/0006; C07F15/006; C07F15/0066; C07F15/0086; C07F15/0093; F; F21; F21V; F21V9/00; F21V9/04; G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/223
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
177 words
A compound represented by the formula: ##STR3## wherein M represents nickel, palladium or platinum; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 , which may be the same or different from one another, each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkoxycarbonyl group, or a substituted or unsubstituted phenyl group; each pair of R 1 and R 2 , R 2 and R 3 , R 3 and R 4 , R 4 and R 5 , R 5 and R 6 , R 6 and R 7 , and R 7 and R 8 may be bonded to each other to form a ring; and R 9 , R 10 , R 11 and R 12 each represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted amino group, which may be the same or different from one another.
Claim 2
Dependent Claim
177 words
A compound represented by the formula: ##STR3## wherein M represents nickel, palladium or platinum; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 , which may be the same or different from one another, each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkoxycarbonyl group, or a substituted or unsubstituted phenyl group; each pair of R 1 and R 2 , R 2 and R 3 , R 3 and R 4 , R 4 and R 5 , R 5 and R 6 , R 6 and R 7 , and R 7 and R 8 may be bonded to each other to form a ring; and R 9 , R 10 , R 11 and R 12 each represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted amino group, which may be the same or different from one another.
Claim 3
Dependent Claim
21 words
The compound as claimed in claim 1, wherein at least one of R 9 to R 12 is an alkyl group.
Claim 4
Dependent Claim
14 words
The compound as claimed in claim 2, wherein R 10 is a methyl group.
Claim 5
Dependent Claim
63 words
The compound as claimed in claim 1, wherein at least one pair of R 1 and R 2 , R 2 and R 3 , R 3 and R 4 , R 4 and R 5 , R 5 and R 6 , R 6 and R 7 , and R 7 and R 8 bonds to each other to form a ring.
Claim 6
Dependent Claim
22 words
The compound as claimed in claim 4, wherein R 4 and R 5 bond to each other to form a benzene ring.
Claim 7
Dependent Claim
29 words
The compound as defined in claim 4, wherein R 1 and R 2 , and R 7 and R 8 bond to each other to form benzene rings, respectively.
Claim 8
Dependent Claim
12 words
An infrared absorbent composition containing at least one compound of claim 1.
Claim 9
Dependent Claim
23 words
The infrared absorbent composition as claimed in claim 7 wherein at least one of R 9 to R 12 is an alkyl group.
Claim 10
Dependent Claim
65 words
The infrared absorbent composition as claimed in claim 7 wherein at least one pair of R 1 and R 2 , R 2 and R 3 , R 3 and R 4 , R 4 and R 5 , R 5 and R 6 , R 6 and R 7 , and R 7 and R 8 bonds to each other to form a ring.
Claim 11
Dependent Claim
15 words
The infrared absorbent composition as claimed in claim 7 further comprising a film forming binder.
Claim 12
Dependent Claim
16 words
The infrared absorbent composition as claimed in claim 8, wherein R 10 is a methyl group.
Claim 13
Dependent Claim
24 words
The infrared absorbent composition as claimed in claim 9, wherein R 4 and R 5 bond to each other to form a benzene ring.
Claim 14
Dependent Claim
31 words
The infrared absorbent composition as claimed in claim 9, wherein R 1 and R 2 , and R 7 and R 8 bond to each other to form benzene rings, respectively.
Claim 15
Dependent Claim
14 words
The infrared absorbent composition as claimed in claim 7, further comprising an ultraviolet absorbent.
Claim 16
Dependent Claim
17 words
The compound as claimed in claim 1 which has an absorption maximum at 700 nm or more.
Claim 17
Dependent Claim
48 words
The compound as claimed in claim 1, wherein the alkoxy-carbonyl groups represented by R 1 to R 8 contain 2 to 19 carbon atoms and may be branched or straight chain and the alkyl group represented by R 1 to R 8 contains 1 to 4 carbon atoms.
Claim 18
Dependent Claim
11 words
The compound as claimed in claim 1, wherein M is platinum.
Claim 19
Dependent Claim
11 words
An optical filter containing at least one compound of claim 1.
Claim 20
Dependent Claim
28 words
The optical filter as claimed in claim 18, which comprises 0.1 to 50 parts by weight of said compound contained in 100 parts by weight of a binder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |