US4756757A
Expired / Lapsed
US
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Recording liquid
Assignee: Canon Inc
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Filing: 1986-12-05
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Granted: 1988-07-12
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Expires: 2006-12-05
Abstract
Abstract In a recording liquid comprising, as essential components, a colorant in an amount necessary to image formation, water, an a water-miscible organic solvent, said recording liquid is characterized in that the total number of colonies in the Ames test thereof is not more than four times that of the control test using sterilized water.
Inventors
- 👤 Masahiro Haruta
- 👤 Masatsune Kobayashi
- 👤 Tokuya Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:11
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/16
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
52 words
A recording liquid comprising a colorant in an amount necessary for image formation, water and a water-miscible organic solvent, said recording liquid being characterized in that the total number of colonies resulting from an Ames test thereof is not more than four times the number in a control test using sterilized water.
Claim 2
Dependent Claim
52 words
A recording liquid comprising a colorant in an amount necessary for image formation, water and a water-miscible organic solvent, said recording liquid being characterized in that the total number of colonies resulting from an Ames test thereof is not more than four times the number in a control test using sterilized water.
Claim 3
Dependent Claim
32 words
The recording liquid of claim 1, which is characterized in that the total number of colonies in said test is not more than triple that of the control test using sterilized water.
Claim 4
Dependent Claim
14 words
The recording liquid of claim 1, wherein the colorant content is 1-20% by weight.
Claim 5
Dependent Claim
18 words
The recording liquid of claim 1, wherein the content of the water-miscible organic solvent is 5-95% by weight.
Claim 6
Dependent Claim
14 words
The recording liquid of claim 1, wherein the water content is 10-90% by weight.
Claim 7
Dependent Claim
59 words
A recording liquid suitable for ink-jet recording comprising, as essential components, a colorant in an amount necessary for image formation, water and a water-miscible organic solvent, said recording liquid being characterized in that the total number of colonies resulting from an Ames test thereof is not more than four times the number in a control test using sterilized water.
Claim 8
Dependent Claim
59 words
A recording liquid suitable for ink-jet recording comprising, as essential components, a colorant in an amount necessary for image formation, water and a water-miscible organic solvent, said recording liquid being characterized in that the total number of colonies resulting from an Ames test thereof is not more than four times the number in a control test using sterilized water.
Claim 9
Dependent Claim
32 words
A recording liquid according to claim 6 characterized in that the total number of colonies in said Ames test is not more than triple that of the control test using sterilized water.
Claim 10
Dependent Claim
15 words
A recording liquid according to claim 6 wherein the colorant content is 1-20% by weight.
Claim 11
Dependent Claim
19 words
A recording liquid according to claim 6 wherein the content of the water-miscible organic solvent is 5-95% by weight.
Claim 12
Dependent Claim
15 words
A recording liquid according to claim 6 wherein the water content is 10-90% by weight.
Claim 13
Dependent Claim
21 words
A recording liquid according to claim 6 wherein the Ames test is carried out using strain TA 98 of Salmonella typhimurium.
Claim 14
Dependent Claim
21 words
A recording liquid according to claim 7 wherein the Ames test is carried out using strain TA 98 of Salmonella typhimurium.
Claim 15
Dependent Claim
63 words
A recording liquid comprising a purified dye in an amount sufficient for visible image formation, water and a water-miscible organic solvent as essential components, said recording liquid being such that the total number of colonies resulting from an Ames test thereof using a Salmonella typhimurium TA 98 bacterial strain is not more than four times that of a control test using sterilized water.
Claim 16
Dependent Claim
63 words
A recording liquid comprising a purified dye in an amount sufficient for visible image formation, water and a water-miscible organic solvent as essential components, said recording liquid being such that the total number of colonies resulting from an Ames test thereof using a Salmonella typhimurium TA 98 bacterial strain is not more than four times that of a control test using sterilized water.
Claim 17
Dependent Claim
30 words
The recording liquid of claim 13 wherein the Ames test thereof yields a total number of colonies not more than three times that of the control test using sterilized water.
Claim 18
Dependent Claim
27 words
The recording liquid of claim 13, said liquid employing a colorant in amounts between 1 and 20% by weight based on the weight of the recording liquid.
Claim 19
Dependent Claim
29 words
The recording liquid of claim 13, said liquid employing a water-miscible organic solvent in amounts between 5 and 95% by weight based on the weight of the recording liquid.
Claim 20
Dependent Claim
26 words
The recording liquid of claim 13, said liquid employing water in amounts between 10 and 90% by weight based on the weight of the recording liquid.
Claim 21
Dependent Claim
18 words
The recording liquid of claim 13 wherein the sterilized Ames test control water is provided by distilled water.
Claim 22
Dependent Claim
20 words
The recording liquid according to claim 13, including utilizing at least one nitrogen-containing heterocyclic ketone as said water-miscible organic solvent.
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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) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |