US4503098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable articles coated with degradable water insoluble polymers
Assignee: Union Carbide Corp
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Filing: 1982-08-05
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Granted: 1985-03-05
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Expires: 2002-08-05
Abstract
Abstract Described herein are disposable articles made from a water soluble polymer or a substrate made from such polymer, a surface of said article or substrate coated with a degradable water-insoluble polymer.
Inventors
- 👤 James E. Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:32
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F13/15252; A61F13/20; A61F13/2051; A61F13/26; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; A61L15/62; A61F13/2002; A61F13/202; A61F13/84; A61F13/8405; A61F2013/15008; A61F2013/15048; A61F13/15211; A61F2013/15235; A61F13/51; A61F2013/51002; A61F2013/51023; A61F2013/51035; A61F2013/51059; A61F2013/51061; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31888; Y10T428/31909; Y10T428/31913; Y10T428/31938; Y10T428/31971
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A process for producing a degradable article or substrate by coating a disposable article or substrate made from a water-soluble polymer selected from one or more of a poly(alkylene oxide), hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, polyacrylic acid, or poly(vinyl methyl ether-co maleic anhydride): with a degradable water-insoluble polymer selected from one or more of a cyclic ester polymer, a poly(β-hydroxy butyrate), a dialkanoyl polymer, or an ethylene polymer: which comprises forming a solution by dissolving the water-insoluble polymer in a solvent and then applying the solution containing from about 0.5 to about 10 wt. % of the polymer in the solvent to at least one surface of the article or substrate so as to form a coating thereon of from 0.05 to about 5 mils in thickness.
Claim 2
Dependent Claim
131 words
A process for producing a degradable article or substrate by coating a disposable article or substrate made from a water-soluble polymer selected from one or more of a poly(alkylene oxide), hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, polyacrylic acid, or poly(vinyl methyl ether-co maleic anhydride): with a degradable water-insoluble polymer selected from one or more of a cyclic ester polymer, a poly(β-hydroxy butyrate), a dialkanoyl polymer, or an ethylene polymer: which comprises forming a solution by dissolving the water-insoluble polymer in a solvent and then applying the solution containing from about 0.5 to about 10 wt. % of the polymer in the solvent to at least one surface of the article or substrate so as to form a coating thereon of from 0.05 to about 5 mils in thickness.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the entire surface of said article or substrate is coated with said degradable water-insoluble polymer.
Claim 4
Dependent Claim
15 words
The process of claim 1 for coating an article wherein the article is a laminate.
Claim 5
Dependent Claim
16 words
The process of claim 1 for coating an article wherein the article contains a seed therein.
Claim 6
Dependent Claim
18 words
The process of claim 1 for coating an article wherein the article is a carrier for organic material.
Claim 7
Dependent Claim
27 words
The process of claim 1 for coating an article wherein the article is a catamenial device, a sanitary napkin, a tampon applicator, a diaper or a bandage.
Claim 8
Dependent Claim
17 words
The process of claim 1 for coating a substrate wherein the substrate is a film or sheet.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein said water-soluble polymer is poly(ethylene oxide).
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein said water-soluble polymer is a biodegradable polycaprolactone polymer.
References Cited (Backward Citations)
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US3850862A
Cited
US4136697A
Cited
US3934587A
Cited
US4069082A
Cited
US4107426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |