Patent US2819940A successfully refreshed from Google Patents.
US5314531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-aqueous ball point pen ink
Assignee: Evonik Operations GmbH
•
Filing: 1993-02-11
•
Granted: 1994-05-24
•
Expires: 2013-02-11
Abstract
Abstract Non-aqueous ball point pen inks, which contain dyes, resins, solvents and additives which demonstrate improved rheological behavior under the most varied climatic conditions. Leaking and spotting are reliably avoided, and ink production is simplified. Alcohol-soluble cellulose derivatives are used as additives.
Inventors
- 👤 Bernhard Huber
- 👤 Werner Freitag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16; C09D11/18
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
39 words
A non-aqueous ball point pen ink containing a dye, resin and solvent, said ink comprising 0.01 to 10% by weight of an alcohol-soluble cellulose compound and having a viscosity in the range of 2-15 Pa.sup.. s at 23° C.
Claim 2
Dependent Claim
39 words
A non-aqueous ball point pen ink containing a dye, resin and solvent, said ink comprising 0.01 to 10% by weight of an alcohol-soluble cellulose compound and having a viscosity in the range of 2-15 Pa.sup.. s at 23° C.
Claim 3
Dependent Claim
45 words
The non-aqueous ball point pen ink of claim 1, wherein said cellulose compound is selected from the group consisting of C 1-4 alkyl cellulose ethers, C 1-4 hydroxyalkyl cellulose ethers, cellulose esters of C 2-16 carboxylic acids and cellulose esters of aceto-C 2-8 carboxylic acids.
Claim 4
Dependent Claim
34 words
The non-aqueous ball point pen ink of claim 1, wherein said cellulose compound is selected from the group consisting of hydroxypropyl cellulose, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, ethyl cellulose, cellulose acetobutyrate and cellulose acetopropionate.
Claim 5
Dependent Claim
15 words
The non-aqueous ball point pen ink of claim 1, wherein said cellulose is hydroxypropyl cellulose.
Claim 6
Dependent Claim
27 words
The non-aqueous ball point pen ink of claim 1, wherein said cellulose is selected from the group consisting of hydroxyethyl cellulose, ethyl hydroxyethyl cellulose or ethyl cellulose.
Claim 7
Dependent Claim
26 words
The non-aqueous ball point pen ink of claim 1, comprising a resin selected from the group consisting of ketone resins, aldehyde resins, and allyl alcohol polymers.
Claim 8
Dependent Claim
49 words
The non-aqueous ball point pen ink of claim 1, wherein said resin is a ketone or aldehyde resin selected from the group consisting of acetophenone/formaldehyde resins, hydrogenated acetophenone/formaldehyde resins, urethanized acetophenone/formaldehyde resins, ethylene urea/formaldehyde resins, isobutyraldehyde/urea/formaldehyde resins, cyclohexanone/formaldehyde resins, alkyl cyclohexanone/formaldehyde resins, cyclohexanone resins and methyl ethyl ketone/formaldehyde resins.
Claim 9
Dependent Claim
27 words
The non-aqueous ball point pen ink of claim 1, wherein said resin is selected from the group consisting of partially hydrogenated acetophenone/formaldehyde resins and styrene/allyl alcohol copolymers.
Claim 10
Dependent Claim
23 words
The non-aqueous ball point pen ink of claim 1, comprising a solvent selected from the group consisting of glycols, glycol ethers and alcohols.
Claim 11
Dependent Claim
22 words
The non-aqueous ball point pen ink of claim 6, comprising a solvent selected from the group consisting of benzyl alcohol and phenoxyethanol.
Claim 12
Independent Claim
58 words
A method for improving the viscosity/temperature behavior of a ball point pen ink and reducing the sensitivity of the ink to moisture, comprising adding 0.01 to 10% by weight of an alcohol-soluble cellulose compound to a ball point pen ink containing a dye, resin and solvent, said ink having a viscosity of 2-15 Pa.sup.. s at 23° C.
Claim 13
Independent Claim
58 words
A method for improving the viscosity/temperature behavior of a ball point pen ink and reducing the sensitivity of the ink to moisture, comprising adding 0.01 to 10% by weight of an alcohol-soluble cellulose compound to a ball point pen ink containing a dye, resin and solvent, said ink having a viscosity of 2-15 Pa.sup.. s at 23° C.
Claim 14
Dependent Claim
18 words
The non-aqueous ball point pen ink of claim 1, wherein said solvent is a C 6-12 aryl alcohol.
Claim 15
Dependent Claim
18 words
The non-aqueous ball point pen ink of claim 1, wherein said solvent is a C 6-12 aralkyl alcohol.
Claim 16
Dependent Claim
18 words
The non-aqueous ball point pen ink of claim 1, wherein said solvent is a C 12-30 fatty acid.
Claim 17
Dependent Claim
14 words
The non-aqueous ball point pen ink of claim 10, wherein said solvent is phenoxyethanol.
Claim 18
Dependent Claim
38 words
The non-aqueous ball point pen ink of claim 1, wherein said solvent is selected from the group consisting of 1,2-propane diol, ethylene diglycol, butylene diglycol, dipropylene glycol, 2-ethyl-1,3-hexane diol, diethylene glycol, triethylene glycol, oleic acid and castor oil.
Claim 19
Dependent Claim
59 words
A non-aqueous ball point pen ink containing a dye and resin, said ink comprising 0.01 to 10% by weight of an alcohol-soluble cellulose compound, 45 to 70% by weight of a solvent selected from the group consisting of C 6-12 aralkyl alcohols and C 12-30 fatty acids, said ink having a viscosity of 2-15 Pa.sup.. s at 23° C.
Claim 20
Dependent Claim
59 words
A non-aqueous ball point pen ink containing a dye and resin, said ink comprising 0.01 to 10% by weight of an alcohol-soluble cellulose compound, 45 to 70% by weight of a solvent selected from the group consisting of C 6-12 aralkyl alcohols and C 12-30 fatty acids, said ink having a viscosity of 2-15 Pa.sup.. s at 23° C.
References Cited (Backward Citations)
US3961965A
Cited
US3891581A
Cited
US4227930A
Cited
US4664711A
Cited
US4657590A
Cited
US4671691A
Cited
US5013361A
Cited
US4822417A
Cited
JPH01299880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |