Patent US5087659A successfully refreshed from Google Patents.
US5087659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink compositions as steam sterilizing indicators for use in ink jet printing
Assignee: Sakura Color Products Corp
•
Filing: 1989-10-02
•
Granted: 1992-02-11
•
Expires: 2009-10-02
Abstract
Abstract An ink composition as a steam sterilizing indicator for use in ink jet printing which comprises a salt of a cyanine dyestuff with phenol resins in amounts of 0.1-5% by weight as the cyanine dyestuff and in amounts of 0.2-30% by weight as the phenol resins, dissolved in organic solvents in amounts of 70-96% by weight based on the ink composition. The ink composition may further contain at least one of alkali metal salts, resins containing carboxyl groups therein, aliphatic carboxylic acids, anticorrosion agents, nonionic surfactants and dyestuffs which are unchanged in color under sterilizing conditions. The ink composition is discolored or changes in color under steam sterilization conditions.
Inventors
- 👤 Toshiki Fujisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:01
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/26; A61L2/28; C; C09; C09D; C09D11/00; C09D11/30; C09D11/36; C09D11/50
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
63 words
An ink composition as a steam sterilizing indicator for use in ink jet printing which comprises a salt of a cyanine dyestuff with phenol resins in amounts of 0.1-5% by weight as the cyanine dyestuff and in amounts of 0.2-30% by weight as the phenol resins, dissolved in organic solvent in amounts of 70-96% by weight of solvent based on the ink composition.
Claim 2
Dependent Claim
63 words
An ink composition as a steam sterilizing indicator for use in ink jet printing which comprises a salt of a cyanine dyestuff with phenol resins in amounts of 0.1-5% by weight as the cyanine dyestuff and in amounts of 0.2-30% by weight as the phenol resins, dissolved in organic solvent in amounts of 70-96% by weight of solvent based on the ink composition.
Claim 3
Dependent Claim
29 words
The ink composition as claimed in claim 1 which further contains an alkali metal salt in amounts of not more than 8% by weight based on the ink composition.
Claim 4
Dependent Claim
51 words
The ink composition as claimed in claim 1 which further contains a resin containing carboxyl groups therein selected from the group consisting of rosin, hydrogenated rosin, rosin ester, rosin-modified phenol resin, maleic resin and styrene-maleic copolymer resin, in amounts of not more than 20% by weight based on the ink composition.
Claim 5
Dependent Claim
29 words
The ink composition as claimed in claim 1 which further contains an aliphatic carboxylic acid in amounts of not more than 5% by weight based on the ink composition.
Claim 6
Dependent Claim
17 words
The ink composition as claimed in claim 1 which further contains an anticorrosion agent in effective amounts.
Claim 7
Dependent Claim
17 words
The ink composition as claimed in claim 1 which further contains a nonionic surfactant in effective amounts.
Claim 8
Dependent Claim
21 words
The ink composition as claimed in claim 1 which further contains a dyestuff which is unchanged in color under sterilizing conditions.
Claim 9
Independent Claim
59 words
A method of producing an ink composition as a steam sterilizing indicator for use in ink jet printing which comprises dissolving a cyanine dyestuff and a phenol resin in lower aliphatic alcohols and heating the mixture to remove the alcohols to provide a salt of the cyanine dyestuff with the phenol resin, and dissolving the salt in organic solvents.
Claim 10
Independent Claim
59 words
A method of producing an ink composition as a steam sterilizing indicator for use in ink jet printing which comprises dissolving a cyanine dyestuff and a phenol resin in lower aliphatic alcohols and heating the mixture to remove the alcohols to provide a salt of the cyanine dyestuff with the phenol resin, and dissolving the salt in organic solvents.
Claim 11
Dependent Claim
21 words
The method as claimed in claim 8 wherein the alcohol is selected from the group consisting of methanol, ethanol and isopropanol.
Claim 12
Independent Claim
77 words
A method of steam sterilization of substrates which comprises applying an ink composition as a steam sterilizing indicator on the substrates in ink jet printing operations, the ink composition comprising a salt of a cyanine dyestuff with phenol resins in amounts of 0.1-5% by weight as the cyanine dyestuff and in amounts of 0.2-30% by weight as the phenol resins, dissolved in organic solvent in amounts of 70-96% by weight of solvent based on the ink composition.
Claim 13
Independent Claim
77 words
A method of steam sterilization of substrates which comprises applying an ink composition as a steam sterilizing indicator on the substrates in ink jet printing operations, the ink composition comprising a salt of a cyanine dyestuff with phenol resins in amounts of 0.1-5% by weight as the cyanine dyestuff and in amounts of 0.2-30% by weight as the phenol resins, dissolved in organic solvent in amounts of 70-96% by weight of solvent based on the ink composition.
Claim 14
Dependent Claim
62 words
The method as claimed in claim 10 wherein the ink composition further contains at least one of alkali metal salts, resins containing carboxyl groups therein selected from the group consisting of rosin, hydrogenated rosin, rosin ester, rosin-modified phenol resin, maleic resin and styrene-maleic copolymer resin, aliphatic carboxylic acids, anticorrosion agents, nonionic surfactants and dyestuffs which are unchanged in color under sterilizing conditions.
References Cited (Backward Citations)
US4605441A
Cited
US4465800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |