US3565979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash spinning
Assignee: EIDP Inc
•
Filing: 1968-09-18
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Granted: 1971-02-23
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Expires: 1988-09-18
Abstract
Abstract POLYMERIC FLASH-UPON STRANDS ARE ELECTROSTATICALLY CHARGED BY PASSAGE BETWEEN AN ION GUN AND TARGET PLATE, THEN COLLECTED ON AN OPPOSITELY CHARGED OR GROUNDED SURFACE. LOSS OF ELECTROSTATIC CHARGING OF THE STRANDS, DUE TO POLYMER BUILD-UP ON THE TARGET PLATE, IS PREVENTED BY MAINTAINING A CONDUCTIVE SUBSTANCE ON THE PLATE SURFACE. THE CONDUCTIVE SUBSTANCE CAN BE APPLIED CONTINUOUSLY BY WIPING A LIQUID COMPRISING IT ONTO THE SURFACE AS THE PLATE ROTATES.
Inventors
- 👤 Louis C Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:14
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; D01; D01D; D01D5/00; D01D5/11
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |