US4655834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording process
Assignee: CAON 30-2 3-CHOME SHIMOMARUKO OHTA-KU TOKYO JAPAN A CORP OF JAPAN KK
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Filing: 1985-08-01
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Granted: 1987-04-07
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Expires: 2005-08-01
Abstract
Abstract In a recording liquid comprising, as essential components, a colorant in an amount necessary to image formation, water, and 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
2026-10-24 15:06
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
65 words
A process for ink jet recording comprising (a) selecting a recording liquid such that the total number of colonies in an Ames test thereof is not more than 4 times that of a control test using sterilized water; and (b) ejecting onto a recording medium droplets of a recording liquid having a colorant in amounts necessary for image formation, water and a water-miscible organic solvent.
Claim 2
Dependent Claim
65 words
A process for ink jet recording comprising (a) selecting a recording liquid such that the total number of colonies in an Ames test thereof is not more than 4 times that of a control test using sterilized water; and (b) ejecting onto a recording medium droplets of a recording liquid having a colorant in amounts necessary for image formation, water and a water-miscible organic solvent.
Claim 3
Dependent Claim
42 words
The ink jet recording process of claim 1, including selecting a recording liquid such that the Ames test conducted on said recording liquid yields a total number of colonies not more than three times that of the control test using sterilized water.
Claim 4
Dependent Claim
29 words
The ink jet recording process of claim 1, said process employing a colorant in amounts between 1 and 20% by weight based on the weight of the recording liquid.
Claim 5
Dependent Claim
31 words
The ink jet recording process of claim 1, said process employing a water-miscible organic solvent in amounts between 5 and 95% by weight based on the weight of the recording liquid.
Claim 6
Dependent Claim
28 words
The ink jet recording process of claim 1, said process employing water in amounts between 10 and 90% by weight based on the weight of the recording liquid.
Claim 7
Dependent Claim
26 words
The ink jet recording process of claim 1, including selecting a recording liquid in which said Ames test is conducted using a Salmonella TA98 bacterial strain.
Claim 8
Dependent Claim
35 words
The ink jet recording process of claim 6, including selecting the recording liquid such that the total number of colonies in the Ames test thereof is not more than three times that of said control.
Claim 9
Dependent Claim
19 words
The ink jet recording process of claim 6, including employing distilled water for use in the Ames test control.
Claim 10
Dependent Claim
34 words
The ink jet recording process according to claim 6, including dissolving said colorant in said liquid medium at a concentration between 1 to 20% by weight, based upon the weight of the recording liquid.
Claim 11
Dependent Claim
25 words
The ink jet recording process according to claim 6, including employing as said water-miscible organic solvent, a polyhydric alcohol or a lower alkyl ether thereof.
Claim 12
Dependent Claim
36 words
The ink jet recording process according to claim 6, including employing said water-miscible organic solvent in said liquid medium at a concentration between 5 to 95% by weight, based upon the weight of the recording liquid.
Claim 13
Dependent Claim
34 words
The ink jet recording process according to claim 6, including utilizing said water in said liquid medium at a concentration between 10 to 90% by weight, based upon the weight of the recording liquid.
Claim 14
Dependent Claim
26 words
The ink jet recording process according to claim 6, including utilizing as said water-miscible organic solvent in said liquid medium at least one nitrogen-containing heterocyclic ketone.
References Cited (Backward Citations)
US3846141A
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US4153467A
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US4024096A
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US4165399A
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US4170482A
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US4285727A
Cited
US4269627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |