US4937146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin-coated article having low tack
Assignee: EBI LLC
•
Filing: 1988-02-26
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Granted: 1990-06-26
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Expires: 2008-02-26
Abstract
Abstract A water curable resin-coated sheet useful as an orthopedic cast having a non-polar hydrophobic lubricant admixed with a resin prepolymer in the coating in order to provide low surface tack. A method of preparation involves mixing the lubricant and resin prepolymer briefly to form an unstable mixture and immediately applying the mixture to a substrate sheet of fiberglass or the like, the lubricant being present in an amount in excess of that which is miscible with the resin prepolymer.
Inventors
- 👤 Ronald M. Dull
- 👤 Lawrence B. Smith
- 👤 Harold E. Garey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:30
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/07; A61L15/10; A61F; A61F13/00; A61F13/04; A61L15/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31801
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
An article having improved shelf life comprising a water curable resin-coated sheet having a non-polar lubricant admixed with the resin coating, said lubricant being hydrophobic and incompatible with said resin to an extent such that at least part of said lubricant is at the surface of said coating whereby to provide low tack at said surface, said lubricant comprising from about 2 to about 40 parts by weight and said resin comprising from about 98 to about 60 parts by weight of the admixture.
Claim 2
Dependent Claim
84 words
An article having improved shelf life comprising a water curable resin-coated sheet having a non-polar lubricant admixed with the resin coating, said lubricant being hydrophobic and incompatible with said resin to an extent such that at least part of said lubricant is at the surface of said coating whereby to provide low tack at said surface, said lubricant comprising from about 2 to about 40 parts by weight and said resin comprising from about 98 to about 60 parts by weight of the admixture.
Claim 3
Dependent Claim
15 words
The article claimed in claim 1, wherein said water curable resin is an isocyanate-functional prepolymer.
Claim 4
Dependent Claim
22 words
The article claimed in claim 2, wherein said lubricant comprises from about 8 to about 20 parts by weight of said admixture.
Claim 5
Dependent Claim
32 words
The article claimed in claim 1, wherein said non-polar lubricant is selected from the group consisting of mineral oil, paraffin wax, microcrystalline wax, vegetable oil, animal oil, hydrogenated oils, and mixtures thereof.
References Cited (Backward Citations)
US3043298A
Cited
US3089486A
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US3630194A
Cited
US3763858A
Cited
US4454873A
Cited
US4667661A
Cited
US4690842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |