US4467013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bioactive water and alcohol-repellant medical fabric
Assignee: American Hospital Supply Corp
•
Filing: 1982-07-20
•
Granted: 1984-08-21
•
Expires: 2002-07-20
Abstract
Abstract Non-woven bioactive, water and alcohol-repellent medical fabrics are described. The fabric is provided with a bioactive finish which is substantive on the fabric and is able to destroy migrating and cross-contaminating bacteria, algae and fungi. The bioactive material is 3-(trimethoxysilyl)-propyloctadecyl dimethyl ammonium chloride and is present to the extent of about 0.15 to about 1.05% on the basis of the fabric weight. A fluoropolymer provides the necessary alcohol and saline repellency. The described fabrics have numerous medical uses such as surgeon's gowns, medical drapes, isolation gowns and instrument wraps.
Inventors
- 👤 A. Frank Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:37
CPC Classifications
D; D06; D06M; D06M16/00; A; A61; A61B; A61B42/00; A61B46/00; A61B46/40; A61L; A61L15/00; A61L15/16; A61L15/18; A61L15/42; A61L15/52; A61L31/00; A61L31/14; A61L31/16; D06M15/00; D06M15/19; D06M15/37; D06M15/55; D06M15/643; D06M15/65; A61F; A61F13/00; A61F2013/00089; A61F2013/00297; A61F2013/00361; A61F2013/00902; A61F2013/0091; A61L2300/00; A61L2300/20; A61L2300/204; A61L2300/208; A61L2300/40; A61L2300/404; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/218; Y10T442/2525; Y10T442/2549; Y10T442/2566
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
51 words
A bioactive, water-repellent, alcohol-repellent non-woven cellulosic medical fabric having incorporated thereon a non-leachable, bioactive amount of 3-(trimethoxysilyl)-propyloctadecyl dimethyl ammonium chloride present in an amount of from about 0.15% to about 1.05% on the basis of the weight of the fabric together with an alcohol and saline-repelling amount of a fluoropolymer repellent.
Claim 2
Dependent Claim
51 words
A bioactive, water-repellent, alcohol-repellent non-woven cellulosic medical fabric having incorporated thereon a non-leachable, bioactive amount of 3-(trimethoxysilyl)-propyloctadecyl dimethyl ammonium chloride present in an amount of from about 0.15% to about 1.05% on the basis of the weight of the fabric together with an alcohol and saline-repelling amount of a fluoropolymer repellent.
Claim 3
Dependent Claim
102 words
The bioactive fabric of claim 1 which: (i) is leachable only to the extent of at most 0.2 ppm from a 6 in. by 6 in. swatch; (ii) is water repellent, as measured by at least a 45 minute test value according to INDA test IST 80.7--70 (R-77); (iii) has a spray rating value of at least 75 as measured by AATCC test 22-1971; (iv) has an alcohol repellency of at least 70% to isopropanol in the manner of INDA test IST 80.9-74 (R77); and (v) exhibits a static decay time of less than about 0.5 seconds according to NFPA test 56A.
References Cited (Backward Citations)
US3247280A
Cited
US3560442A
Cited
US3488217A
Cited
US3660008A
Cited
US3796686A
Cited
US3730701A
Cited
US3794736A
Cited
US3788803A
Cited
US3817739A
Cited
US4211815A
Cited
US3991237A
Cited
US4035411A
Cited
US4219625A
Cited
US4184004A
Cited
US4262043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |