US3420724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing bonded,nonwoven fabrics
Assignee: Hercules LLC
•
Filing: 1965-05-18
•
Granted: 1969-01-07
•
Expires: 1985-05-18
Abstract
No abstract record available.
Inventors
- 👤 Robert H Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:25
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PREPARING A BONDED, NONWOVEN FABRIC WHICH COMPRISES PREPARING A WEB COMPRISING SYNTHETIC, ORGANIC, THERMOPLASTIC STAPLE FIBERS, SAID WEB HAVING INTERMITTENT DARK AND LIGHT COLORED AREAS, EXPOSING THE WEB TO RADIANT HEAT, WHEREBY THE FIBERS IN THE DARK AREAS MELT PREFERENTIALLY, AND THEREAFTER COOLING THE WEB SO THAT THE MOLTEN THERMOPLASTIC FIBERS SOLIDIFY AND BECOME BONDED TO THE LIGHT COLORED FIGERS.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PREPARING A BONDED, NONWOVEN FABRIC WHICH COMPRISES PREPARING A WEB COMPRISING SYNTHETIC, ORGANIC, THERMOPLASTIC STAPLE FIBERS, SAID WEB HAVING INTERMITTENT DARK AND LIGHT COLORED AREAS, EXPOSING THE WEB TO RADIANT HEAT, WHEREBY THE FIBERS IN THE DARK AREAS MELT PREFERENTIALLY, AND THEREAFTER COOLING THE WEB SO THAT THE MOLTEN THERMOPLASTIC FIBERS SOLIDIFY AND BECOME BONDED TO THE LIGHT COLORED FIGERS.
References Cited (Backward Citations)
US2774129A
Cited
US2959509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |