US3743528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for impregnating fibrous filter material
Assignee: Liggett Group LLC
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Filing: 1971-07-08
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Granted: 1973-07-03
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Expires: 1991-07-08
Abstract
Abstract THE FILTER MATERIAL IS DEPOSITED ONTO THE ROTATING DELIVERY ROLLER PRIOR TO ENTRY OF THE TRAVELLING WEB OF TOW BETWEEN THE NIP OF THE DRIVEN ROLLER AND IDLER ROLLER SO THAT THE FILTER MATERIAL IS FORCED INTO THE WEB UPON PASSING THROUGH THE NIP. THE EMBEDDING OF THE FILTER MATERIAL INTO THE ERB IN THE NIP SERVES TO DISTRIBUTE THE MATERIAL MORE UNIFORMLY THROUGH THE CROSS-SECTION OF THE TWO BEFORE THE TWO IS GATHERED TOGETHER AND FORMED INTO A ROD.
Inventors
- 👤 D Calleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:53
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204; A24D3/0212; A24D3/0225; B; B01; B01D; B01D39/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |