US3945836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink composition
Assignee: Sakura Color Products Corp
•
Filing: 1973-04-05
•
Granted: 1976-03-23
•
Expires: 1993-04-05
Abstract
Abstract An ink composition which comprises an aliphatic hydrocarbon solvent having dissolved therein a resinous binder and a modified dye, said modified dye being a reaction product obtained by reacting a dye having at least one group of --CO 2 M and --SO 3 M in the molecule wherein M is an alkali metal with an organic ammonium compound.
Inventors
- 👤 Fumio Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:40
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16; C09D11/17; Y; Y10; Y10S; Y10S260/00; Y10S260/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
235 words
An ink composition for a marking pen consisting of a substantially odorless and nontoxic aliphatic hydrocarbon solvent having dissolved therein 5 to 35% by weight of a resinous binder in the form of a rosin derivative and 5 to 20% by weight of a modified dye, all % weights being based on the weight of the composition, said modified dye being a reaction product obtained by reacting (a) an anthraquinone dye having at least one group of --CO 2 M and --SO 3 M in the molecule wherein M is an alkali metal with (b) an organic ammonium compound represented by the formula ##EQU4## wherein R 1 , R 2 , R 3 and R 4 are respectively a hydrocarbon radical having 1 to 40 carbon atoms, a radical of a hydrocarbon bonded to a hydrocarbon by a divalent group of --O--, --S--, --COO--, --CONH--or --NH--, the total carbon number of both hydrocarbons bonded being in range of 2 to 40, or ##EQU5## R' being an alkyl having 1 to 15 carbon atoms or an alkenyl having 1 to 20 carbon atoms, provided that the total carbon number of R 1 , R 2 , R 3 and R 4 is in the range of 11 to 55 and X is a halogen atom, said modified dye having a high solubility in said solvent whereby drying of the ink in the pen nib is minimized.
Claim 2
Dependent Claim
235 words
An ink composition for a marking pen consisting of a substantially odorless and nontoxic aliphatic hydrocarbon solvent having dissolved therein 5 to 35% by weight of a resinous binder in the form of a rosin derivative and 5 to 20% by weight of a modified dye, all % weights being based on the weight of the composition, said modified dye being a reaction product obtained by reacting (a) an anthraquinone dye having at least one group of --CO 2 M and --SO 3 M in the molecule wherein M is an alkali metal with (b) an organic ammonium compound represented by the formula ##EQU4## wherein R 1 , R 2 , R 3 and R 4 are respectively a hydrocarbon radical having 1 to 40 carbon atoms, a radical of a hydrocarbon bonded to a hydrocarbon by a divalent group of --O--, --S--, --COO--, --CONH--or --NH--, the total carbon number of both hydrocarbons bonded being in range of 2 to 40, or ##EQU5## R' being an alkyl having 1 to 15 carbon atoms or an alkenyl having 1 to 20 carbon atoms, provided that the total carbon number of R 1 , R 2 , R 3 and R 4 is in the range of 11 to 55 and X is a halogen atom, said modified dye having a high solubility in said solvent whereby drying of the ink in the pen nib is minimized.
Claim 3
Dependent Claim
13 words
The ink composition according to claim 1, wherein said X is chlorine atom.
Claim 4
Dependent Claim
38 words
The ink composition according to claim 1, wherein said dye to be modified has one to two --CO 2 Na groups, one to two --SO 3 Na groups or both --CO 2 Na and SO 3 Na groups.
Claim 5
Dependent Claim
20 words
The ink composition of claim 1 wherein the dye is Acid-blue 43 and the rosin derivative is pentaerythritolhydrogenated rosin ester.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |