US3822173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needled felt flooring
Assignee: Carl Freudenberg KG
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Filing: 1972-12-29
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Granted: 1974-07-02
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Expires: 1992-12-29
Abstract
Abstract NEEDLED FELT FLOORING, WITH A VELOUR-LIKE SURFACE, COMPRISING A LAYER OF STRIP MATERIAL DISPOSED OVER A FIBROUS NEEDLED SHEET, SAID STRIP MATERIAL HAVING A LAYER OF A SECOND FIBROUS SHEET DISPOSED THEREOVER, THE FIBERS OF WHICH PASS THROUGH THE STRIP MATERIAL AND THE NEEDLED FIBROUS SHEET DISPOSED THEREBENEATH, FORMING A PILE SURFACE OF SINGLE FIBERS OF EQUAL LENGTH; A METHOD OF PREPARING A NEEDLED FELT FLOORING IS ALSO DISCLOSED. D R A W I N G
Inventors
- 👤 A Graber
- 👤 B Tecl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:07
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/022; B32B5/024; B32B5/06; B32B5/28; D; D04; D04H; D04H11/00; D04H11/08; D06; D06N; D06N7/00; D06N7/0005; D06N7/006; B32B2250/00; B32B2250/03; B32B2250/20; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/023; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2471/00; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23943; Y10T428/23986; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/666; Y10T442/667
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |