US4171983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capillary type ink
Assignee: Gillette Co LLC
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Filing: 1977-11-30
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Granted: 1979-10-23
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Expires: 1997-11-30
Abstract
Abstract Ink compositions for use in capillary type writing instruments containing quaternary ammonium of the formula: RCH.sub.2 N(CH.sub.3).sub.3.sup.+ X.sup.- wherein R is --CH 2 OH or --COOH, and X is --OH, --Cl, --Br, or --I. These ink compositions, when used in capillary type writing instruments, allow rejuvenation of writing points which have dried out from exposure to the atmosphere.
Inventors
- 👤 Robert F. Farmer, III
- 👤 Phillip E. Sokol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:08
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A writing system comprising a capillary type writing instrument charged with an aqueous solution containing: (a) from about 0.5% to about 15% by weight of a water soluble dye; and (b) from about 1% to about 25% of a quaternary ammonium compound of the formula RCH.sub.2 N(CH.sub.3).sub.3.sup.+ X.sup.- wherein R is --CH 2 OH or --COOH, and X is --OH, --Cl, --Br, or --I.
Claim 2
Dependent Claim
64 words
A writing system comprising a capillary type writing instrument charged with an aqueous solution containing: (a) from about 0.5% to about 15% by weight of a water soluble dye; and (b) from about 1% to about 25% of a quaternary ammonium compound of the formula RCH.sub.2 N(CH.sub.3).sub.3.sup.+ X.sup.- wherein R is --CH 2 OH or --COOH, and X is --OH, --Cl, --Br, or --I.
Claim 3
Dependent Claim
25 words
A writing system as described in claim 1 in which the percent by weight of said quaternary ammonium compound is from 5 to about 15.
Claim 4
Dependent Claim
17 words
A writing system as described in claim 1 in which said quaternary ammonium compound is (β-hydroxyethyl)trimethylammonium chloride.
Claim 5
Dependent Claim
17 words
A writing system as described in claim 1 in which said quaternary ammonium compound is carboxymethyltrimethylammonium hydroxide.
Claim 6
Dependent Claim
24 words
A writing system as described in claim 1 further including from about 1% to about 50% by weight of a water soluble polyhydric alcohol.
Claim 7
Dependent Claim
14 words
A writing system as described in claim 5 in which said alcohol is glycerin.
Claim 8
Dependent Claim
15 words
A writing system as described in claim 5 in which said alcohol is ethylene glycol.
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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |