US4601756A
Expired / Lapsed
US
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Recording liquid
Assignee: Canon Inc
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Filing: 1984-10-15
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Granted: 1986-07-22
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Expires: 2004-10-15
Abstract
Abstract A recording liquid comprises a liquid composition containing water-soluble dyes as coloring component, characterized in that C.I. Food Black 2 and one or more dyes in different color or colors are used in combination as said coloring component.
Inventors
- 👤 Masahiro Chiba
- 👤 Kazuo Iwata
- 👤 Tadayuki Nakousai
- 👤 Hiroko Ogawa
- 👤 Takashi Ohba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A recording liquid comprising a liquid composition having water-soluble dyes as a coloring component, wherein said coloring component is C.I. Food Black 2 and a member of the group consisting of at least one water-soluble blue dye, at least one water-soluble red dye, at least one water-soluble yellow dye and mixtures thereof wherein the weight ratio of the yellow colored dye to the Food Black 2 is from about 1:100 to 30:100; the weight ratio of the red colored dye to the Food Black 2 is from about 1:100 to 30:100 and the weight ratio of the blus colored dye to the Food Black 2 is from about 1:10 to 10:1.
Claim 2
Dependent Claim
111 words
A recording liquid comprising a liquid composition having water-soluble dyes as a coloring component, wherein said coloring component is C.I. Food Black 2 and a member of the group consisting of at least one water-soluble blue dye, at least one water-soluble red dye, at least one water-soluble yellow dye and mixtures thereof wherein the weight ratio of the yellow colored dye to the Food Black 2 is from about 1:100 to 30:100; the weight ratio of the red colored dye to the Food Black 2 is from about 1:100 to 30:100 and the weight ratio of the blus colored dye to the Food Black 2 is from about 1:10 to 10:1.
Claim 3
Dependent Claim
48 words
A recording liquid composition comprising a liquid composition having a coloring component, wherein said coloring component is C.I. Food Black 2 and at least one water soluble blue dye, wherein the weight ratio of said blue dye to said Food Black 2 is from about 1:10 to 10:1.
Claim 4
Dependent Claim
48 words
A recording liquid composition comprising a liquid composition having a coloring component, wherein said coloring component is C.I. Food Black 2 and at least one water soluble blue dye, wherein the weight ratio of said blue dye to said Food Black 2 is from about 1:10 to 10:1.
Claim 5
Dependent Claim
84 words
A recording liquid composition comprising a liquid composition having a colorant component, wherein said coloring component is C.I. Food Black 2 and a member of the group consisting of at least one water soluble red dye, at least one water soluble yellow dye and mixtures thereof, wherein the weight ratio of the red dye to the Food Black 2 is from about 1:100 to 30:100 and the weight ratio of the yellow dye to the Food Black 2 is from about 1:100 to 30:100.
Claim 6
Dependent Claim
84 words
A recording liquid composition comprising a liquid composition having a colorant component, wherein said coloring component is C.I. Food Black 2 and a member of the group consisting of at least one water soluble red dye, at least one water soluble yellow dye and mixtures thereof, wherein the weight ratio of the red dye to the Food Black 2 is from about 1:100 to 30:100 and the weight ratio of the yellow dye to the Food Black 2 is from about 1:100 to 30:100.
Claim 7
Dependent Claim
15 words
A recording liquid according to claim 1, wherein said liquid composition is an aqueous solution.
Claim 8
Dependent Claim
37 words
A recording liquid according to claim 1, wherein the content of said coloring component in the recording liquid is in the range of 0.5 to 20% by weight based on the total weight of the recording liquid.
Claim 9
Dependent Claim
84 words
A recording liquid according to claim 2, wherein said blue color dye is selected from the group consisting of C.I. Acid Blue 9 C.I. Acid Blue 13, C.I. Acid Blue 68, C.I. Acid Blue 69, C.I. Acid Blue 138, C.I. Acid Blue 185, C.I. Acid Blue 249, C.I. Acid Blue 258, C.I. Direct Blue 83, C.I. Direct Blue 86, C.I. Direct Blue 87, C.I. Direct Blue 95, C.I. Direct Blue 149, C.I. Direct Blue 166, C.I. Direct Blue 176 and C.I. Direct Blue 199.
Claim 10
Dependent Claim
15 words
A recording liquid according to claim 2, wherein said liquid composition is an aqueous solution.
Claim 11
Dependent Claim
15 words
A recording light according to claim 3, wherein said liquid composition is an aqueous solution.
References Cited (Backward Citations)
US4168662A
Cited
US4197135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |