US5603992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions and methods for the temporary protection of activated surfaces
Assignee: Cal-West Equipment Co Inc
•
Filing: 1995-04-18
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Granted: 1997-02-18
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Expires: 2015-04-18
Abstract
Abstract This invention provides methods and compositions for the temporary protection of activated plastic surfaces. The methods involve application of protective coating compositions to activated surfaces thereby protecting the surfaces from oxidation, soiling and mechanical damage. The coatings may be easily washed off leaving a clean activated surface suitable for overcoating.
Inventors
- 👤 Edward W. Woodhall
- 👤 Ronald Swidler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:46
CPC Classifications
B; B08; B08B; B08B17/00; B08B17/02; B08B17/04; B05; B05D; B05D5/00; C; C09; C09D; C09D101/00; C09D103/00; C09D103/02; C09D5/00; C09D5/008; B05D1/00; B05D1/32; B05D1/322; B05D1/327
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
76 words
A method of temporarily protecting an activated plastic surface, said method comprising the steps of: applying to said surface a surface protective coating composition, said coating composition comprising: a film former selected from the group consisting of a dextrin, a cellulose, and a cellulose derivative; a plasticizer; and water; said step of applying resulting in a substantially continuous film of said composition; and removing said substantially continuous film by washing when protection is no longer desired.
Claim 2
Independent Claim
76 words
A method of temporarily protecting an activated plastic surface, said method comprising the steps of: applying to said surface a surface protective coating composition, said coating composition comprising: a film former selected from the group consisting of a dextrin, a cellulose, and a cellulose derivative; a plasticizer; and water; said step of applying resulting in a substantially continuous film of said composition; and removing said substantially continuous film by washing when protection is no longer desired.
Claim 3
Dependent Claim
40 words
The method of claim 1, wherein: said film former is present at about 5% to about 60%, by weight, of the total composition; and said plasticizer is present at about 1% to about 50%, by weight, of the total composition.
Claim 4
Dependent Claim
35 words
The method of claim 2, wherein: said film former is dextrin present at about 40%, by weight, of the total composition; and said plasticizer is present at about 30%, by weight, of the total composition.
Claim 5
Dependent Claim
10 words
The method of claim 3, wherein said plasticizer is glycerine.
Claim 6
Dependent Claim
35 words
The method of claim 2 wherein: said film former is dextrin present at about 10%, by weight, of the total composition; and said plasticizer is present at about 1.5%, by weight, of the total composition.
Claim 7
Dependent Claim
10 words
The method of claim 5, wherein said plasticizer is glycerine.
Claim 8
Dependent Claim
12 words
The method of claim 1, wherein said composition further comprises a thickener.
Claim 9
Dependent Claim
23 words
The method of claim 7, wherein said thickener is present at about 0.1% to about 2 %, by weight, of the total composition.
Claim 10
Dependent Claim
18 words
The method of claim 8, wherein said plasticizer is glycerine, and said thickener is an acrylic polymer emulsion.
Claim 11
Dependent Claim
17 words
The method of claim 8, wherein said plasticizer is glycerine, and said thickener is a hydroxyethyl cellulose.
Claim 12
Dependent Claim
12 words
The method of claim 7, wherein said composition further comprises a surfactant.
Claim 13
Dependent Claim
21 words
The method of claim 11, wherein said surfactant is present at up to about 2%, by weight, of the total composition.
Claim 14
Dependent Claim
26 words
The method of claim 13, wherein said surfactant comprises about 0.1 percent of the total composition and about 50% of the surfactant is a fluorinated surfactant.
Claim 15
Independent Claim
60 words
A method of temporarily protecting an activated plastic surface, said method comprising the step of applying to said surface a surface protective coating composition, said coating composition comprising: a film former selected from the group consisting of a starch or a derivatized starch; a plasticizer; and water; said step of applying resulting in a substantially continuous film of said composition.
Claim 16
Independent Claim
60 words
A method of temporarily protecting an activated plastic surface, said method comprising the step of applying to said surface a surface protective coating composition, said coating composition comprising: a film former selected from the group consisting of a starch or a derivatized starch; a plasticizer; and water; said step of applying resulting in a substantially continuous film of said composition.
Claim 17
Dependent Claim
40 words
The method of claim 14, wherein: said film former is present at about 5% to about 60%, by weight, of the total composition; and said plasticizer is present at about 1% to about 50%, by weight, of the total composition.
Claim 18
Dependent Claim
34 words
The method of claim 15, wherein: said film former is present at about 10%, by weight, of the total composition; and said plasticizer is present at about 1.5%, by weight, of the total composition.
Claim 19
Dependent Claim
10 words
The method of claim 16, wherein said plasticizer is glycerine.
Claim 20
Dependent Claim
12 words
The method of claim 14, wherein said composition further comprises a thickener.
Claim 21
Dependent Claim
22 words
The method of claim 18, wherein said thickener is present at about 0.1% to about 2%, by weight, of the total composition.
Claim 22
Dependent Claim
18 words
The method of claim 19, wherein said plasticizer is glycerine, and said thickener is an acrylic polymer emulsion.
Claim 23
Dependent Claim
12 words
The method of claim 18, wherein said composition further comprises a surfactant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-02-18 | 2000-08-19 | 2001-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-18 | 2004-08-19 | 2005-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-18 | 2008-08-19 | 2009-02-18 | $7700.00 | Window Closed / Lapsed |