US3755527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing melt blown nonwoven synthetic polymer mat having high tear resistance
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-10-09
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Granted: 1973-08-28
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Expires: 1989-10-09
Abstract
Abstract A HIGHLY TEAR RESISTANT NONWOVEN MAT OF THERMOPLASTIC POLYMER FIBERS IS MADE IN A MELT-BLOWING PROCESS IN WHICH A MOLTEN POLYMERIC RESIN IS EXTRUDED THROUGH A ROW OF DIE OPENINGS INTO A STREAM OF HOT GAS WHICH ATTENUATES THE RESIN INTO FIBERS HAVING DIAMETERS BETWEEN ABOUT 10-40 MICRONS. THE FIBERS ARE COLLECTED ON A CONTINUOUSLY MOVING SURFACE POSITIONED FROM ABOUT 10 TO ABOUT 30 INCHES FROM THE DIE OPENINGS.
Inventors
- 👤 J Keller
- 👤 J Prentice
- 👤 J Harding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:33
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; D01; D01D; D01D5/00; D01D5/08; D01D5/098; D01D5/0985; D01D7/00
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |