US3740282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making artificial leather from lapped fibrous structures
Assignee: Celanese Corp
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Filing: 1971-02-16
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Granted: 1973-06-19
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Expires: 1991-02-16
Abstract
Abstract MAKING STRATFIED LAPPED FIBROUS STRUCTURES SUCH AS CROSS-LAPPED WEBS, OR YARNS, WHICH HAVE LAYERS OF DIFFERENT FIBERS BY FOR EXAMPLE, FEEDING A WEB HAVING SIDEBY-SIDE BANDS OF DIFFERENT FIBERS TO A CROSS-LAPPING DEVICE.
Inventors
- 👤 G Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:46
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/74; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1015; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/2419; Y10T428/24215; Y10T428/24231; Y10T428/24479; Y10T428/249921; Y10T428/249953; Y10T428/249978
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |