Patent US3674618A successfully refreshed from Google Patents.
US3674618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imitation sliver knit pile fabric
Assignee: Phillips Petroleum Co
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Filing: 1970-11-16
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Granted: 1972-07-04
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Expires: 1990-11-16
Abstract
Abstract A LAYER OF NONVOVEN STAPLE FIBERS IS NEEDLE PUNCHED INTO A THERMOPLASTIC FILM. THE FIBERS ON ONE SIDE OF THE FILM ARE THERMALLY BONDED TO THE FILM. THE FIBERS ON THE OPPOSITE SIDE OF THE FILM ARE THEN SUBJECTED TO NAPPING AND SHEARING OPERATIONS. THE FILM IS PREFERABLY AN ORIENTED POLYPROPYLENE FILM WHICH FIBRILLATES DURING THE NEEDLING OPERATION. THE FABRIC IS USEFUL AS A LINING IN COATS.
Inventors
- 👤 Donald C Spann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:42
CPC Classifications
D; D04; D04H; D04H11/00; D04H11/08; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/2395
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |