US3676288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-density bonded nonwoven fabrics and process therefor
Assignee: Fiber Technology Corp
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Filing: 1970-05-04
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Granted: 1972-07-11
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Expires: 1990-05-04
Abstract
Abstract FIBROUS WEBS IN WHICH THE FIBERS ARE FREE TO MOVE RELATIVE TO EACH OTHER ARE BONDED WITH FLUID POLYMERIC BINDER SOLUTIONS OR DISPERSIONS CONTAINING A PROPORTION OF MICROSPHERIC SPHERES OF EXPANDABLE PLASTIC FILLED WITH AN EXPANDABLE LOW-BOILING LIQUID OR VAPOR. IN DRYING THE FLUID FROM THE BINDER, THE MICROSPHERES ARE EXPANDED IN VOLUME BUT NOT RUPTURED, LEADING TO THE FORMATION OF NONWOVEN FABRICS WITH LOW DENSITY AND HIGH FLUID ABSORBENCY.
Inventors
- 👤 Albert G Hoyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:18
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/587; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T442/00; Y10T442/60; Y10T442/699
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |