Patent US3614953A successfully refreshed from Google Patents.
US3426754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathable medical dressing
Assignee: Celanese Corp
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Filing: 1966-09-14
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Granted: 1969-02-11
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Expires: 1986-09-14
Abstract
No abstract record available.
Inventors
- 👤 Harvey S Bierenbaum
- 👤 Robert B Isaacson
- 👤 Peter R Lantos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:22
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/023; A; A61; A61F; A61F13/00; A61F13/02; A61F13/023; B29C55/04; B29C55/06; B29C55/065; C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/27; B29C48/00; B29C48/001; B29C48/0012; B29C48/03; B29C48/07; B29C48/08; B29K; B29K2105/00; B29K2105/04; B29L; B29L2023/00; B29L2023/001; C08J2323/00; C08J2323/02; C08J2323/10; C08J2359/00; C08J2359/02; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249982; Y10T428/249983
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A MICROPOROUS BREATHABLE DRESSING COMPRISING A FILM OF A POLYMER: SAID FILM BEING CHARACTERIZED BY AN APPARENT DENSITY LOWER THAN THE ACTUAL DENSITY OF SAID POLYMER FROM WHICH SAID FILM IS PREPARED AND BY A MICROPOROUS STRUCTURE WHEREIN THE PORE SPACES OF SAID STRUCTURE ACCESSIBLE TO THE OUTSIDE OF SAID FILM RANGE FROM ABOUT 100 TO 5000 ANGSTROM UNITS, AS POROSIMETRICALLY DETERMINED BY MERCURY PENETRATION.
Claim 2
Dependent Claim
65 words
A MICROPOROUS BREATHABLE DRESSING COMPRISING A FILM OF A POLYMER: SAID FILM BEING CHARACTERIZED BY AN APPARENT DENSITY LOWER THAN THE ACTUAL DENSITY OF SAID POLYMER FROM WHICH SAID FILM IS PREPARED AND BY A MICROPOROUS STRUCTURE WHEREIN THE PORE SPACES OF SAID STRUCTURE ACCESSIBLE TO THE OUTSIDE OF SAID FILM RANGE FROM ABOUT 100 TO 5000 ANGSTROM UNITS, AS POROSIMETRICALLY DETERMINED BY MERCURY PENETRATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |