US3728207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven fabric
Assignee: Carl Freudenberg KG
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Filing: 1970-11-12
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Granted: 1973-04-17
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Expires: 1990-11-12
Abstract
Abstract A NON-WOVEN FABRIC COMPRISING A FIBROUS MAT BOUNDED WITH COLLAGEN, THE CONCENTRATION OF COLLAGEN DECREASING FROM THESURFACE INWARDLY. IN THIS WAY, THE HIGH-COLLAGEN SURFACE CAN BE APPLIED AGAINST WOUNDS, WITH WHICH IT IS CHEMICALLY COMPATIBLE. BY COATING THE LOW-COLLAGEN SURFACE WITH PLASTIC SUCH AS POLYVINYLIDENE CHLORIDE AND FORMING A TUBE WITH THE HIGH-COLLAGEN SURFACE INSIDE, THE TUBE WILL CONFORM CLOSELY TO SAUSAGE MATERIAL FILLING EVEN IF THE LATTER SHRINKS, SO AS TO MAINTAIN A PLEASING APPEARANCE, THE PLASTIC EXTERIOR, HOWEVER, KEEPS THE PRODUCT IMPERVIOUS TO WATER VAPOR AND AIR.
Inventors
- 👤 W Heling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; A; A22; A22C; A22C13/00; A22C13/0013; A22C13/0016; A61; A61F; A61F13/00; A61F13/01; A61F13/01008; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/32; A61L15/325; B32B1/00; B32B1/08; B32B27/30; B32B27/304; B32B5/00; B32B5/02; B32B5/022; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4282; D04H1/4291; D04H1/4326; D04H1/4334; D04H1/58; D04H1/587; D21; D21F; D21F11/00; D21F11/14; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/00744; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/06; B32B2262/062; B32B2305/00; B32B2305/10; B32B2305/20; B32B2439/00; B32B2439/70; B32B2597/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31935; Y10T442/00; Y10T442/20; Y10T442/2762; Y10T442/277; Y10T442/2787
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |