US4800872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ravel-free orthopaedic casting tapes
Assignee: Johnson and Johnson Professional Inc
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Filing: 1987-01-20
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Granted: 1989-01-31
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Expires: 2007-01-20
Abstract
Abstract The casting tape substrate of the present invention is coated with a very soft, low modulus binder which is compatible with the polyurethane prepolymer or other curable resin which will be subsequently coated onto the substrate to form the casting tape. The binder prevents the cut ends of the substrate from unraveling. The binder may be applied in a pattern or continuously to the entire length of the substrate or may be applied at spaced zones where the knitted substrate will be cut to form a particular length of casting tape.
Inventors
- 👤 George J. Buese
- 👤 Hee K. Yoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:53
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/10; D04B21/12; A; A61; A61F; A61F13/00; A61F13/04; A61L; A61L15/00; A61L15/07; D10; D10B; D10B2509/00; D10B2509/02; D10B2509/024; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24785; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
94 words
A ravel resistant, orthopedic casting tape of the type comprising of knitted fiberglass substrate impregnated with a water reactive, hardenable, liquid resin, said substrate being coated, prior to the application of the liquid hardenable resin, with a soft, flexible binder to form a thin, stretchable coating to resist ravel of the fiberglass, said binder being essentially not reactive with the hardenable liquid resin and the binder having a type A hardness less than 50, and being applied to the substrate in an amount from 2.5 to 90 grams per square meter of coated area.
Claim 2
Dependent Claim
94 words
A ravel resistant, orthopedic casting tape of the type comprising of knitted fiberglass substrate impregnated with a water reactive, hardenable, liquid resin, said substrate being coated, prior to the application of the liquid hardenable resin, with a soft, flexible binder to form a thin, stretchable coating to resist ravel of the fiberglass, said binder being essentially not reactive with the hardenable liquid resin and the binder having a type A hardness less than 50, and being applied to the substrate in an amount from 2.5 to 90 grams per square meter of coated area.
Claim 3
Dependent Claim
24 words
The casting tape of claim 1 in which the binder is applied only at the ends of a finite length of said casting tape.
Claim 4
Dependent Claim
19 words
The casting tape of claim 1 in which the binder has a Type A hardness between 15 and 50.
Claim 5
Dependent Claim
20 words
The casting tape of claim 2 in which the binder includes an indicator which fluoreses when subjected to ultraviolet light.
Claim 6
Dependent Claim
14 words
The casting tape of claim 1 in which the binder is an acrylic polymer.
Claim 7
Dependent Claim
14 words
The casting tape of claim 1 in which the binder is a polyurethane polymer.
Claim 8
Dependent Claim
19 words
The casting tape of claim 3 in which the binder has a Type A hardness between 20 and 40.
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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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |