US3575752A
Expired / Lapsed
US
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Nonwoven bonding method
Assignee: Hercules LLC
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Filing: 1968-05-22
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Granted: 1971-04-20
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Expires: 1988-05-22
Abstract
Abstract A SELF-BONDED NONWOVEN FIBROUS SHEET IS MADE BY (1) DISPOSING AN AT LEAST PARTIALLY THERMOPLASTIC, ORIENTED FIBROUS MATERIAL UPON A SURFACE IN RANDOM, MULTI-DIRECTIONAL, OVERLAPPING AND INTERSECTING ARRANGEMENT TO FORM A BATT OR WEB AND (2) IMPOSING A SOURCE OF SONIC ENERGY UPON THE BATT OR WEB TO SELECTIVELY HEAT AND BOND THE FIBROUS ELEMENTS AT THEIR POINTS OF CONTACT OR CROSSOVER.
Inventors
- 👤 Charles W Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:54
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C65/78; B29C65/7858; B29C65/7888; B29C65/7891; B29C66/00; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/71; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0854
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |