US5199976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ozone-friendly correction fluid
Assignee: Berol Corp
•
Filing: 1992-03-13
•
Granted: 1993-04-06
•
Expires: 2012-03-13
Abstract
Abstract An ozone-friendly correction fluid includes a non-halogenated solvent, a vinyl toluene-butadiene copolymer as the polymeric film-forming material, a dispersing agent, and an opacifying agent.
Inventors
- 👤 Chiou C. Yau
- 👤 Norman G. Sanborn
- 👤 Kim H. Ng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:52
CPC Classifications
C; C09; C09D; C09D10/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
24 words
An ozone-friendly correction fluid comprising: a non-halogenated solvent; a film-forming polymeric material comprising a vinyl toluene-butadiene copolymer; a dispersing agent; and an opacifying agent.
Claim 2
Dependent Claim
24 words
An ozone-friendly correction fluid comprising: a non-halogenated solvent; a film-forming polymeric material comprising a vinyl toluene-butadiene copolymer; a dispersing agent; and an opacifying agent.
Claim 3
Dependent Claim
22 words
The correction fluid of claim 1 wherein said solvent comprises a cyclohexane or any alkylated cyclohexane containing 10 or fewer carbon atoms.
Claim 4
Dependent Claim
11 words
The correction fluid of claim 2 wherein said solvent is methylcyclohexane.
Claim 5
Dependent Claim
11 words
The correction fluid of claim 2 wherein said solvent is dimethylcyclohexane.
Claim 6
Dependent Claim
11 words
The correction fluid of claim 2 wherein said solvent is ethylcyclohexane.
Claim 7
Dependent Claim
15 words
The correction fluid of claim 1 wherein said dispersing agent is a dialkyl sodium sulfosuccinate.
Claim 8
Dependent Claim
14 words
The correction fluid of claim 6 wherein said dispersing agent is dioctyl sodium sulfosuccinate.
Claim 9
Dependent Claim
47 words
The correction fluid of claim 7 comprising between 35% and 55% of said solvent by weight; between 4% and 12% of said copolymer by weight; between 1% and 3.5% of said dioctyl sodium sulfosuccinate by weight; and between 35% and 55% of said opacifying agent by weight.
Claim 10
Dependent Claim
11 words
The correction fluid of claim 8 wherein said solvent is methylcyclohexane.
Claim 11
Dependent Claim
24 words
The correction fluid of claim 1 wherein said film-forming polymeric material is vinyl toluene-butadiene copolymer with a weight-average molecular weight between 78,000 and 152,000.
Claim 12
Dependent Claim
10 words
The correction fluid of claim 10 further comprising a plasticizer.
Claim 13
Dependent Claim
12 words
The correction fluid of claim 11 wherein said plasticizer is dialkyl phthalate.
Claim 14
Dependent Claim
12 words
The correction fluid of claim 12 wherein said plasticizer is ditridecyl phthalate.
Claim 15
Dependent Claim
15 words
The correction fluid of claim 13 wherein said dispersing agent is a polymeric fatty ester.
Claim 16
Dependent Claim
13 words
The correction fluid of claim 1 wherein the opacifying agent is titanium dioxide.
Claim 17
Dependent Claim
37 words
The correction fluid of claim 15 wherein said solvent is a blend of said cyclohexane or said alkylated cyclohexane with other hydrocarbons, said blend comprising at least 50% of said cyclohexane or said alkylated cyclohexane by weight.
Claim 18
Dependent Claim
40 words
An ozone-friendly correction fluid comprising: a solvent comprising cyclohexane or an alkylated cyclohexane containing 10 or fewer carbon atoms; a film-forming polymeric material comprising a vinyl toluene-butadene copolymer; a dispersing agent comprising an alkyl sodium sulfosuccinate; and an opacifying agent.
Claim 19
Dependent Claim
40 words
An ozone-friendly correction fluid comprising: a solvent comprising cyclohexane or an alkylated cyclohexane containing 10 or fewer carbon atoms; a film-forming polymeric material comprising a vinyl toluene-butadene copolymer; a dispersing agent comprising an alkyl sodium sulfosuccinate; and an opacifying agent.
Claim 20
Dependent Claim
16 words
The correction fluid of claim 17 wherein said film-forming polymeric material comprises a vinyl toluene-butadiene copolymer.
Claim 21
Dependent Claim
11 words
The correction fluid of claim 18 wherein said solvent is methylcyclohexane.
Claim 22
Dependent Claim
15 words
The correction fluid of claim 18 wherein said dispersing agent is a dialkyl sodium sulfosuccinate.
Claim 23
Dependent Claim
14 words
The correction fluid of claim 20 wherein said dispersing agent is dioctyl sodium sulfosuccinate.
Claim 24
Dependent Claim
46 words
The correction fluid of claim 20 comprising between 35% and 55% of said solvent by weight; between 4% and 12% of said film-forming polymeric material by weight; between 1% and 3.5% of said dispersing agent; and between 35% and 55% of said opacifying agent by weight.
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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) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |