Dressing film
Abstract
Abstract DRESSINGS HAVING A HYDROPHILIC ACRYLIC FILM COMPONENT ADAPTED TO CONTACT A WOUND SURFACE ARE PREPARED IN WHICH THE WOUND CONTACTING FILM IS INSOLUBLE IN BODY FLUIDS BUT HAS A SUBSTANTIAL AFFINITY FOR WATER. MOISTURE ABSORBED BY THE FILM ACTS TO PLASTICIZE THE FILM AND PROVIDED A MOIST, FLEXIBLE, CONFORMING SURFACE TO THE UNDERLYING WOUND TISSUE. THE DRESSING MAY CONSIST OF A SINGLE PIECE OF THE HYDROPHILIC ACRYLIC FILM OR THE FILM MAY FORM A PART OF A COMPOSITE DRESSING WHEREIN THE WOUND CONTACTING SURFACE OF THE DRESSING IS FORMED OF A HYDROPHILIC ACRYLIC FILM. THE HYDROPHILIC ACRLIC FILMS ARE PARTICULARLY SUITABLE FOR USE AS OCCLUSIVE DRESSINGS AND FOR CONTROLLING THE PROLIFERATION OF BACTERIA WHERE THE SAME HAVE, DISPERSED THERETHROUGH, COMPOSITIONS WHICH REACT WITH WATER TO GENERATE A BACTERIOSTATIC SUBSTANCE. WHERE THE FILM BASE IS A HYDROPHILIC ACRYLIC THE EFFECTIVENESS OF THE PRESENCE OF THE BACTERIOSTAT-GENERATING MATERIALS, WHEN PRESENT IS APPRECIABLY INCREASED WHILE ANY CHANCE OF TISSUE IRRITATION IS SUBSTANTIALLY REDUCED.
Inventors
- 👤 Robert J Gander
- 👤 David T Rovee
Bibliographic Details
Claims Analysis
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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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |