Patent US4832009A successfully refreshed from Google Patents.
US4832009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-interpenetrating network polymer backsheet bandage
Assignee: Bio Medical Sciences Inc
•
Filing: 1987-12-23
•
Granted: 1989-05-23
•
Expires: 2007-12-23
Abstract
Abstract An improved bandage comprises a backing sheet constructed of a semi-interpenetrating polymer network. Use of a semi-interpenetrating polymer network allows for an extremely desirable combination of gas permeability and hydrostatic resistance. This construction of backing sheet provides for suitable vapor permeability and sufficient water impermeability because the pores therein are of a colloidal size range and the surface tension thereof results in the backing material being hydrophobic.
Inventors
- 👤 Mark E. Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:38
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/02; A61F13/0203; A61F13/023; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; A61F2013/00361; A61F2013/00846; A61F2013/00855; A61F2013/00863; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
37 words
A bandage comprising: a backing sheet comprising a gas permeable, water impermeable membrane which consists essentially of a semi-interpenetrating polymer network; and a fastening means whereby said bandage is affixed to an affected area to a patient.
Claim 2
Dependent Claim
37 words
A bandage comprising: a backing sheet comprising a gas permeable, water impermeable membrane which consists essentially of a semi-interpenetrating polymer network; and a fastening means whereby said bandage is affixed to an affected area to a patient.
Claim 3
Dependent Claim
19 words
A bandage as recited in claim 1 in which said semi-interpenetrating polymer network comprises fibrillated polytetrafluoroethylene and crosslinked polyorganosiloxane.
Claim 4
Dependent Claim
18 words
A bandage as recited in claim 1 in which said fastening means consists of a pressure sensitive adhesive.
Claim 5
Dependent Claim
18 words
A bandage as recited in claim 1 in which said backing sheet is waterproof up to 200 psi.
Claim 6
Dependent Claim
14 words
A bandage as recited in claim 1 in which said backing sheet is transparent.
Claim 7
Dependent Claim
14 words
A bandage as recited in claim 1 in which said backing sheet is translucent.
Claim 8
Dependent Claim
46 words
A bandage comprising: a backing sheet comprising a gas permeable water impermeable membrane which consists essentially of a semi-interpenetrating polymer network; a fastening means for affixing said bandage to an affected area of a patient; and an absorbent means for absorbing discharge from the affected area.
Claim 9
Dependent Claim
46 words
A bandage comprising: a backing sheet comprising a gas permeable water impermeable membrane which consists essentially of a semi-interpenetrating polymer network; a fastening means for affixing said bandage to an affected area of a patient; and an absorbent means for absorbing discharge from the affected area.
Claim 10
Dependent Claim
19 words
A bandage as recited in claim 7 in which said semi-interpenetrating polymer network comprises fibrillated polytetrafluoroethylene and crosslinked polyorganosiloxane.
Claim 11
Dependent Claim
14 words
A bandage as recited in claim 7 wherein said absorbant means consists of gauze.
Claim 12
Dependent Claim
18 words
A bandage as recited in claim 7 in which said fastening means consists of a pressure sensitive adhesive.
Claim 13
Dependent Claim
18 words
A bandage as recited in claim 7 in which said backing sheet is waterproof up to 200 psi.
Claim 14
Dependent Claim
14 words
A bandage as recited in claim 7 in which said backing sheet is transparent.
Claim 15
Dependent Claim
14 words
A bandage as recited in claim 7 in which said backing sheet is translucent.
References Cited (Backward Citations)
GB837377A
Cited
US3315020A
Cited
US4194040A
Cited
US4187390A
Cited
US3814730A
Cited
US3715334A
Cited
US3775452A
Cited
US4096227A
Cited
US3997702A
Cited
US4043331A
Cited
US4202331A
Cited
US4194041A
Cited
US4300532A
Cited
US4297265A
Cited
US4360015A
Cited
US4373519A
Cited
US4460642A
Cited
US4545372A
Cited
US4664662A
Cited
US4600001A
Cited
US4613544A
Cited
US4764560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |