US3669788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulked nonwovens
Assignee: Celanese Corp
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Filing: 1969-10-10
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Granted: 1972-06-13
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Expires: 1989-10-10
Abstract
Abstract A PROCESS WHICH COMPRISES EXTRUDING A SOLUTION OF A LOWER ALKANOIC ACID ESTER OF CELLULOSE TO FORM FILAMENTS, MOVING THE FILAMENTS ABOUT WHILE IN A MUTUALLY ADHESIVE CONDITION TO CAUSE THEM TO BECOME RANDOMLY DIRECTED AND BONDED TO ONE ANOTHER AT SPACED POINTS, COLLECTING THEM IN A FORM OF A BONDED NON-WOVEN WEB AND CONTACTING THE NON-WOVEN WEB WITH STEAM TO THEREBY IMPROVE THE PHYSICAL PROPERTIES OF THE WEB, I.E., COVERING POWER, RESILIENCE, INSULATION, STRENGTH, DENSITY AND HAND.
Inventors
- 👤 William T Allman Jr
- 👤 Charles W Joseph
- 👤 Ralph G Higgins Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:17
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; D04H3/013
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |