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US4124516A
Expired / Lapsed
US
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Dot-etching solution
Assignee: Fujifilm Holdings Corp
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Filing: 1977-07-20
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Granted: 1978-11-07
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Expires: 1997-07-20
Abstract
Abstract A dot-etching solution for dot-etching a halftone image of a metal composed mainly of aluminum, the dot-etching solution comprising (1) water, (2) (a) phosphorous acid or (b) phosphorous acid and phosphoric acid, (3) at least one of a bismuth compound and an antimony compound, and (4) at least one compound selected from hydrogen chloride, an alkali metal chloride, calcium chloride and magnesium chloride.
Inventors
- 👤 Fumiaki Shinozaki
- 👤 Tomoaki Ikeda
- 👤 Yasuo Washizawa
- 👤 Sho Nakao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:28
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/02; B41C1/025; C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
63 words
A dot-etching solution for dot-etching a halftone image of a metal composed mainly of aluminum, said dot-etching solution comprising (1) water, (2) (a) phosphorous acid or (b) phosphorous acid and phosphoric acid, (3) at least one of a bismuth compound and an antimony compound, and (4) at least one compound selected from hydrogen chloride, an alkali metal chloride, calcium chloride and magnesium chloride.
Claim 2
Dependent Claim
63 words
A dot-etching solution for dot-etching a halftone image of a metal composed mainly of aluminum, said dot-etching solution comprising (1) water, (2) (a) phosphorous acid or (b) phosphorous acid and phosphoric acid, (3) at least one of a bismuth compound and an antimony compound, and (4) at least one compound selected from hydrogen chloride, an alkali metal chloride, calcium chloride and magnesium chloride.
Claim 3
Dependent Claim
17 words
The dot-etching solution of claim 1, wherein said dot-etching solution contains phosphorous acid (a) as component (2).
Claim 4
Dependent Claim
20 words
The dot-etching solution of claim 1, wherein said dot-etching solution contains phosphorous acid and phosphoric acid (b) as component (2).
Claim 5
Dependent Claim
24 words
The dot-etching solution of claim 2, wherein said dot-etching solution has a viscosity at 25° ± 2° C. of about 10 centipoises or less.
Claim 6
Dependent Claim
24 words
The dot-etching solution of claim 3, wherein said dot-etching solution has a viscosity at 25° ± 2° C. of about 10 centipoises or less.
Claim 7
Dependent Claim
51 words
The dot-etching solution of claim 1, wherein said bismuth compound is a bismuth halide, a bismuth oxide, Bi 2 (SO 4 ) 3 or Bi(NO 3 ) 3 and said antimony compound is an antimony halide, an antimony oxide, Sb 2 (SO 4 ) 3 or Sb(NO 3 ) 3 .
Claim 8
Dependent Claim
23 words
The dot-etching solution of claim 1, wherein said alkali metal chloride is lithium chloride, potassium chloride, sodium chloride, rubidium chloride or cesium chloride.
Claim 9
Dependent Claim
72 words
The dot-etching solution of claim 2, wherein about 10 to about 30 mols of said phosphorous acid, about 0.001 mol to a saturated solution of said at least one of a bismuth compound and an antimony compound and about 0.05 mol to a saturated solution of said at least one of hydrogen chloride, an alkali metal chloride, calcium chloride and a magnesium chloride are present in said solution per liter of water.
Claim 10
Dependent Claim
76 words
The dot-etching solution of claim 3, wherein about 10 to about 30 mols of said phosphorous acid and said phosphoric acid, about 0.001 mol to a saturated solution of said at least one of a bismuth compound and an antimony compound and about 0.05 mol to a saturated solution of said at least one of hydrogen chloride, an alkali metal chloride, calcium chloride and a magnesium chloride are present in said solution per liter of water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |