Patent US3813466A successfully refreshed from Google Patents.
US3813466A
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Wound dressings
Assignee: PARACHEM IOWA
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Filing: 1967-05-31
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Granted: 1974-05-28
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Expires: 1987-05-31
Abstract
Abstract THE INVENTION COMPRISES A LAMINATED DRESSING FOR A WOUND COMRPRISING A PRIMARY LAYER WICH IS READILY SOLUBLE IN PLASMA AND A SECONDARY LAYER IN FACE ADHERING CONTACT WITH THE PRIMARY LAYER, ALSO SOLUBLE IN PLASMA BUT TO A LESSER EXTENT THAN THE PRIMARY LAYER.
Inventors
- 👤 R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
B; B32; B32B; B32B27/00; A; A61; A61F; A61F13/00; A61F13/00051; A61F13/00063; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L15/42; A61L15/425; A61F13/15; A61F13/53; A61F13/534; A61F13/84; A61F13/8405; A61F2013/00089; A61F2013/00217; A61F2013/00221; A61F2013/00246; A61F2013/00255; A61F2013/00361; A61F2013/00365; A61F2013/00463; A61F2013/00472; A61F2013/00855; A61F2013/00863; A61F2013/53445; A61L2400/00; A61L2400/04
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |