US5362167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber marker including an erasable ink
Assignee: Berol Corp
•
Filing: 1993-01-29
•
Granted: 1994-11-08
•
Expires: 2013-01-29
Abstract
Abstract An aqueous-based erasable ink composition suitable for use in highlighters and other writing instruments includes a styrene-butadiene copolymer and a water-insoluble pigment. It preferably also includes a release agent and an anti-oxidant, and has a viscosity of between 10cps and 30cps.
Inventors
- 👤 Rachel M. Loftin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:20
CPC Classifications
C; C09; C09D; C09D109/00; C09D109/06; C09D109/08; C09D11/00; C09D11/16; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249996
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
145 words
A method of providing an erasable marking on paper comprising providing a marker comprising an outer body; a porous writing tip at one end of said body; a fiber reservoir included within said body and connected to said porous writing tip; and within said porous writing tip and said fiber reservoir an aqueous-based, non-shear thinning erasable ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex, said latex having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%; and contacting said porous writing tip with a paper substrate to transfer said ink from said porous writing tip to said paper substrate to provide an erasable marking, wherein during said contacting said ink is delivered from said fiber reservoir to said porous writing tip via capillary action.
Claim 2
Independent Claim
145 words
A method of providing an erasable marking on paper comprising providing a marker comprising an outer body; a porous writing tip at one end of said body; a fiber reservoir included within said body and connected to said porous writing tip; and within said porous writing tip and said fiber reservoir an aqueous-based, non-shear thinning erasable ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex, said latex having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%; and contacting said porous writing tip with a paper substrate to transfer said ink from said porous writing tip to said paper substrate to provide an erasable marking, wherein during said contacting said ink is delivered from said fiber reservoir to said porous writing tip via capillary action.
Claim 3
Dependent Claim
18 words
The method of claim 1, further comprising the step of erasing said erasable marking from said paper substrate.
Claim 4
Dependent Claim
16 words
The method of claim 1, wherein said ink has a viscosity of between 10cps and 20cps.
Claim 5
Dependent Claim
12 words
The marker of claim 1, wherein said latex comprises a styrene-butadiene copolymer.
Claim 6
Dependent Claim
12 words
The marker of claim 1, wherein said ink further comprises an antioxidant.
Claim 7
Dependent Claim
13 words
The marker of claim 1, wherein said ink further comprises a release agent.
Claim 8
Dependent Claim
13 words
The marker of claim 1, wherein said ink further comprises a fluorescent pigment.
Claim 9
Dependent Claim
118 words
A marker comprising an outer body; a porous writing tip at one end of said body; a fiber reservoir included within said body and connected to said writing tip; and within said reservoir an aqueous-based, non-shear thinning ink that is erasable from 60 lb. offset printing paper, said ink having a viscosity of between 10cps and 30cps and comprising a water-insoluble colorant and a latex, said latex having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%; wherein when said writing tip is contacted with 60 lb. offset printing paper to mark said paper said ink is delivered from said reservoir to said tip by capillary action.
Claim 10
Dependent Claim
118 words
A marker comprising an outer body; a porous writing tip at one end of said body; a fiber reservoir included within said body and connected to said writing tip; and within said reservoir an aqueous-based, non-shear thinning ink that is erasable from 60 lb. offset printing paper, said ink having a viscosity of between 10cps and 30cps and comprising a water-insoluble colorant and a latex, said latex having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%; wherein when said writing tip is contacted with 60 lb. offset printing paper to mark said paper said ink is delivered from said reservoir to said tip by capillary action.
Claim 11
Dependent Claim
16 words
The marker of claim 8, wherein said ink has a viscosity of between 10cps and 20cps.
Claim 12
Dependent Claim
12 words
The marker of claim 8, wherein said latex comprises a styrene-butadiene copolymer.
Claim 13
Dependent Claim
12 words
The marker of claim 8, wherein said ink further comprises an antioxidant.
Claim 14
Dependent Claim
13 words
The marker of claim 8, wherein said ink further comprises a release agent.
Claim 15
Dependent Claim
13 words
The marker of claim 8, wherein said ink further comprises a fluorescent pigment.
Claim 16
Independent Claim
156 words
A method of providing an erasable marking on a paper substrate comprising providing a marker comprising an outer body; a porous writing tip at one end of said body; a fiber reservoir included within said body and connected to said porous writing tip; and within said porous writing tip and said fiber reservoir an aqueous-based, non-shear thinning erasable ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex emulsion, said latex emulsion having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%; and contacting said porous writing tip with a paper substrate to transfer said ink from said porous writing tip to said paper substrate to provide an erasable marking, wherein during said ink is delivered from said fiber reservoir to said porous writing tip via capillary action when said porous writing tip contacts said paper substrate.
Claim 17
Independent Claim
156 words
A method of providing an erasable marking on a paper substrate comprising providing a marker comprising an outer body; a porous writing tip at one end of said body; a fiber reservoir included within said body and connected to said porous writing tip; and within said porous writing tip and said fiber reservoir an aqueous-based, non-shear thinning erasable ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex emulsion, said latex emulsion having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%; and contacting said porous writing tip with a paper substrate to transfer said ink from said porous writing tip to said paper substrate to provide an erasable marking, wherein during said ink is delivered from said fiber reservoir to said porous writing tip via capillary action when said porous writing tip contacts said paper substrate.
Claim 18
Dependent Claim
18 words
The method of claim 14, further comprising the step of erasing said erasable marking from said paper substrate.
Claim 19
Dependent Claim
16 words
The method of claim 14 wherein said ink has a solids content of less than 50%.
Claim 20
Dependent Claim
15 words
The method of claim 14 wherein said latex has a viscosity of less than 50cps.
Claim 21
Dependent Claim
16 words
The method of claim 17 wherein said latex has a solids content of less than 50%.
Claim 22
Dependent Claim
29 words
The method of claim 16 wherein said latex has a viscosity of less than 50cps and comprises a styrene-butadiene copolymer having a styrene:butadiene ratio of between 10:90 and 35:65.
Claim 23
Dependent Claim
16 words
The method of claim 18 wherein said copolymer has a Mooney value of at least 90.
Claim 24
Dependent Claim
14 words
The method of claim 14 wherein said ink further comprises a silicone release agent.
Claim 25
Dependent Claim
12 words
The method of claim 14 wherein said ink further comprises an anti-oxidant.
Claim 26
Dependent Claim
11 words
The method of claim 22 wherein said anti-oxidant is a cresol.
Claim 27
Dependent Claim
12 words
The method of claim 14 wherein said colorant is a fluorescent pigment.
Claim 28
Dependent Claim
110 words
A marker comprising an outer body; a writing tip at one end of said body; a fiber reservoir included within said body and connected to said writing tip; and within said reservoir an aqueous-based non-shear thinning ink that is erasable from 60 lb. offset printing paper, said ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex emulsion, said latex emulsion having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%; wherein said tip is porous and said ink is delivered from said fiber reservoir to said tip by capillary action.
Claim 29
Dependent Claim
110 words
A marker comprising an outer body; a writing tip at one end of said body; a fiber reservoir included within said body and connected to said writing tip; and within said reservoir an aqueous-based non-shear thinning ink that is erasable from 60 lb. offset printing paper, said ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex emulsion, said latex emulsion having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%; wherein said tip is porous and said ink is delivered from said fiber reservoir to said tip by capillary action.
Claim 30
Dependent Claim
17 words
The marker of claim 25 wherein the viscosity of said ink composition is between 10cps and 20cps.
Claim 31
Dependent Claim
18 words
The marker of claim 25 wherein said latex has a rubber solid content of between 20% and 40%.
Claim 32
Dependent Claim
18 words
The marker of claim 25 wherein said ink includes between 60% and 90% of said latex by weight.
Claim 33
Dependent Claim
16 words
The marker of claim 25 wherein the viscosity of said latex emulsion is less than 50cps.
Claim 34
Dependent Claim
12 words
The marker of claim 25 wherein said latex comprises a styrene-butadiene copolymer.
Claim 35
Dependent Claim
17 words
The marker of claim 30 wherein said styrene-butadiene copolymer has a Mooney value of at least 90.
Claim 36
Dependent Claim
17 words
The marker of claim 30 wherein said copolymer has a styrene:butadiene ratio of between 10:90 and 35:65.
Claim 37
Dependent Claim
12 words
The marker of claim 25 wherein said ink includes a release agent.
Claim 38
Dependent Claim
12 words
The marker of claim 33 wherein said release agent is a silicone.
Claim 39
Dependent Claim
11 words
The marker of claim 25 wherein said ink includes an anti-oxidant.
Claim 40
Dependent Claim
11 words
The marker of claim 35 wherein said anti-oxidant is a cresol.
Claim 41
Dependent Claim
12 words
The marker of claim 35 wherein said colorant is a fluorescent pigment.
Claim 42
Dependent Claim
16 words
The marker of claim 29 wherein said latex has a solids content of less than 50%.
Claim 43
Dependent Claim
20 words
The marker of claim 38 wherein said latex comprises styrene-butadiene copolymer having a styrene:butadiene ratio of between 10:90 and 35:65.
Claim 44
Dependent Claim
14 words
The marker of claim 39 wherein said marking composition further comprises a fluorescent pigment.
Claim 45
Dependent Claim
16 words
The marker of claim 25 wherein said latex has a solids content of less than 50%.
Claim 46
Dependent Claim
15 words
The marker of claim 38 wherein said marking composition further comprises a silicone release agent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |