Patent US5338775A successfully refreshed from Google Patents.
US5338775A
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Correction fluid
Assignee: GILETTE COMPANY
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Filing: 1992-05-19
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Granted: 1994-08-16
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Expires: 2012-05-19
Abstract
Abstract An aqueous, correction fluid that includes a suspending agent, a binding resin, water, and an opacifying pigment. The suspending agent is preferably a gum or hydrocolloid, e.g., xanthan gum, and the composition preferably has a shear-thinning index (n) of from about 0.08 to 0.50.
Inventors
- 👤 Gary F. Matz
- 👤 Kimberly B. Sanborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:29
CPC Classifications
C; C09; C09D; C09D10/00; B; B43; B43K; B43K1/00; B43K1/08; B43K1/084; B43M; B43M11/00; B43M11/06; B43M11/08; B43M11/085; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
An aqueous correction fluid having a shear-thinning index of between 0.08 to 0.50, said correction fluid comprising a binding resin, titanium dioxide as an opacifying agent, water, and a sufficient quantity of a suspending agent to provide said fluid with said shear-thinning index, said correction fluid being capable of obscuring an underlying typewritten marking when applied over said marking on a paper substrate and of providing a surface capable of receiving a corrective typewritten ink marking that can be easily read, said correction fluid having a drying time of about 60 seconds or less.
Claim 2
Dependent Claim
94 words
An aqueous correction fluid having a shear-thinning index of between 0.08 to 0.50, said correction fluid comprising a binding resin, titanium dioxide as an opacifying agent, water, and a sufficient quantity of a suspending agent to provide said fluid with said shear-thinning index, said correction fluid being capable of obscuring an underlying typewritten marking when applied over said marking on a paper substrate and of providing a surface capable of receiving a corrective typewritten ink marking that can be easily read, said correction fluid having a drying time of about 60 seconds or less.
Claim 3
Dependent Claim
14 words
A composition of claim 1 wherein the suspending agent is a gum or hydrocolloid.
Claim 4
Dependent Claim
13 words
A composition of claim 2 wherein the suspending agent is a semi-synthetic gum.
Claim 5
Dependent Claim
17 words
A composition of claim 3 wherein the semi-synthetic gum is a cellulose derivative or microbial fermentation gum.
Claim 6
Dependent Claim
12 words
A composition of claim 4 wherein the semi-synthetic gum is xanthan gum.
Claim 7
Dependent Claim
13 words
A composition of claim 1 wherein the binding resin is an acrylic polymer.
Claim 8
Dependent Claim
10 words
A composition of claim 1 further comprising a dispersing agent.
Claim 9
Dependent Claim
13 words
A composition of claim 7 wherein the dispersing agent is a phosphate ester.
Claim 10
Dependent Claim
34 words
A composition of claim 1 comprising about 2 to 20 percent binding resin, about 20 to 60 percent titanium dioxide, about 35 to 65 percent water and about 0.1 to 0.6 percent suspending agent.
Claim 11
Dependent Claim
14 words
A composition of claim 9 further comprising about 0.2 to 2.0 percent dispersing agent.
Claim 12
Dependent Claim
12 words
A composition of claim 1 having a settling value of about 10.
Claim 13
Dependent Claim
21 words
A composition of claim 1 having a viscosity at 40° C. which is within ±10% of its viscosity at 25° C.
Claim 14
Dependent Claim
16 words
A composition of claim 1 having a shear-thinning index (n) of from about 0.10 to 0.30.
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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) | 1997-08-15 | 1998-02-14 | 1998-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-15 | 2002-02-14 | 2002-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-15 | 2006-02-14 | 2006-08-16 | $7700.00 | Window Closed / Lapsed |