Patent US5336307A successfully refreshed from Google Patents.
US5336307A
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Marker pencil
Assignee: Schwan Stabilo Schwanhausser GmbH and Co KG
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Filing: 1993-04-02
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Granted: 1994-08-09
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Expires: 2013-04-02
Abstract
Abstract A marker pencil comprises a gel-like water-bearing pencil material enclosed in a casing and incorporating a dye carrier. The structure-forming constituents of the pencil material include water-soluble metal soaps and saccharides and/or polyols derived therefrom by reduction. As a further alternative constituent the pencil material may include a fatty substance.
Inventors
- 👤 Ivan Horvat
- 👤 Manfred Schweizer
- 👤 Thomas Stoecklein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:38
CPC Classifications
C; C09; C09D; C09D13/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
A marker pencil comprising a casing and a marking pencil material enclosed in the casing, wherein the pencil material comprises: a dye carrier; structure forming constituents comprising at least one water soluble metal soap in an amount of between about 5% to about 40% by weight of the pencil material, and at least one member selected from the group consisting of monosaccharides, oligosaccharides and polyols derived therefrom by reduction, in an amount of between about 5% to about 50% by weight of the pencil material; and water in an amount of between about 15% to about 65% by weight of the pencil material.
Claim 2
Dependent Claim
103 words
A marker pencil comprising a casing and a marking pencil material enclosed in the casing, wherein the pencil material comprises: a dye carrier; structure forming constituents comprising at least one water soluble metal soap in an amount of between about 5% to about 40% by weight of the pencil material, and at least one member selected from the group consisting of monosaccharides, oligosaccharides and polyols derived therefrom by reduction, in an amount of between about 5% to about 50% by weight of the pencil material; and water in an amount of between about 15% to about 65% by weight of the pencil material.
Claim 3
Dependent Claim
16 words
A marker pencil as set forth in claim 1 wherein the pencil material has thixotropic characteristics.
Claim 4
Dependent Claim
66 words
A marker pencil as set forth in claim 1 wherein the pencil material contains at least one fatty substance in an amount between of about 5% to about 25% by weight of the pencil material, said fatty substance serving as a further structure-forming constituent and to improve adhesion and reduce drying time of a pencil mark on a surface to which said pencil material is applied.
Claim 5
Dependent Claim
48 words
A marker pencil as set forth in claim 3, wherein said fatty substance is selected from the group consisting of natural wax, synthetic wax, solid triglycerides of C 18 -C 36 fatty acids, liquid triglycerides of C 6 -C 10 fatty acids, stearines, paraffin oil and vegetable oil.
Claim 6
Dependent Claim
23 words
A marker pencil as set forth in claim 3 wherein said proportion of fatty substance is between about 8 and 15% by weight.
Claim 7
Dependent Claim
23 words
A marker pencil as set forth in claim 1 wherein a proportion of metal soap is between about 8 and 20% by weight.
Claim 8
Dependent Claim
26 words
A marker pencil as set forth in claim 1 wherein a proportion of saccharide in the pencil material is between about 5 and 50% by weight.
Claim 9
Dependent Claim
22 words
A marker pencil as set forth in claim 7 wherein said proportion of saccharide is between about 25 and 40% by weight.
Claim 10
Dependent Claim
26 words
A marker pencil as set forth in claim 1 wherein a proportion of polyol in the pencil material is between about 5 and 50% by weight.
Claim 11
Dependent Claim
22 words
A marker pencil as set forth in claim 9 wherein said proportion of polyol is between about 25 and 40% by weight.
Claim 12
Dependent Claim
35 words
A marker pencil as set forth in claim 1 wherein the solvent contained in the pencil material is water and the proportion thereof in the pencil material is between about 15 and 65% by weight.
Claim 13
Dependent Claim
22 words
A marker pencil as set forth in claim 11 wherein said proportion of water is between about 30 and 40% by weight.
Claim 14
Dependent Claim
47 words
A marker pencil as set forth in claim 1 wherein a predominant proportion of the metal soap comprises sodium stearate and the pencil material further contains at least one potash soap of at least one member selected from the group consisting of saturated and unsaturated fatty acids.
Claim 15
Dependent Claim
18 words
A marker pencil as set forth in claim 1 wherein the dye carrier includes a daylight fluorescent dye.
Claim 16
Dependent Claim
27 words
A marker pencil as set forth in claim 1 wherein said casing provides means for protecting the pencil material to prevent said pencil material from drying out.
Claim 17
Dependent Claim
33 words
A marker pencil as set forth in claim 1 and further including a housing in which the pencil is interchangeably disposed, and a cap adapted to cover an applicator end of the pencil.
References Cited (Backward Citations)
US2365802A
Cited
US3360489A
Cited
US3861943A
Cited
US4256492A
Cited
US4500221A
Cited
JPS58162673A
Cited
US4461496A
Cited
DE3421408A1
Cited
US5169439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |