US3428506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a needled,nonwoven fibrous structure
Assignee: Hercules LLC
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Filing: 1965-01-11
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Granted: 1969-02-18
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Expires: 1985-01-11
Abstract
No abstract record available.
Inventors
- 👤 Paul L Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:47
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/02; B01D39/04; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/498; D04H13/00; D04H13/02; B01D2239/00; B01D2239/06; B01D2239/065; B01D2239/0659; B01D2239/12; B01D2239/1291; D10; D10B; D10B2503/00; D10B2503/04; D10B2503/041; Y; Y10; Y10S; Y10S264/00; Y10S264/47; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24116
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF PRODUCING A NONWOVEN FIRBOUS STRUCTURE WHICH COMPRISES PENETRATING A FILM ASSEMBLEY COMPRISED OF A PLURALITY OF SUPERPOSED LAYERS OF UNBALANCED ORIENTED POLYMERIC FILM WITH A PLURALITY OF CLOSELY SPACED BARBED NEEDLES WHEREBY EACH FILM LAYER IS FISSURED INTO A FILIGREE STRUCTURE COMPRISED OF INTERCONNECTED FILAMENTARY MEMBERS AND A PLURALITY OF FIBRILS, THE FIBRILS BEING ENTANGLED WITH OTHER FIBRILS AND WITH THE INTERCONNECTED FILAMENTARY MEMBERS TO PROVIDE A UNITARY NONWOVEN STRUCTURE OF GOOD TENSILE AND SEPARATION STRENGTH.
Claim 2
Independent Claim
79 words
A METHOD OF PRODUCING A NONWOVEN FIRBOUS STRUCTURE WHICH COMPRISES PENETRATING A FILM ASSEMBLEY COMPRISED OF A PLURALITY OF SUPERPOSED LAYERS OF UNBALANCED ORIENTED POLYMERIC FILM WITH A PLURALITY OF CLOSELY SPACED BARBED NEEDLES WHEREBY EACH FILM LAYER IS FISSURED INTO A FILIGREE STRUCTURE COMPRISED OF INTERCONNECTED FILAMENTARY MEMBERS AND A PLURALITY OF FIBRILS, THE FIBRILS BEING ENTANGLED WITH OTHER FIBRILS AND WITH THE INTERCONNECTED FILAMENTARY MEMBERS TO PROVIDE A UNITARY NONWOVEN STRUCTURE OF GOOD TENSILE AND SEPARATION STRENGTH.
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |