US3570085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a reinforced fabric by a compressive shrinking operation
Assignee: WR Grace and Co
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Filing: 1968-10-15
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Granted: 1971-03-16
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Expires: 1988-10-15
Abstract
Abstract A FABRIC IS MADE BY MECHANICALLY INTERLOCKING A NONWOVEN FABROUS WEB INTO A SHRINKABLE WOVEN SCRIM AND THEN SHRINKING THE SCRIM BY HEAT AND COMPRESSION TO CONTRACT THE SCRIM ABOUT THE INTERLOCKED NON-WOVEN FIBERS. THE SHRINKING AND SIMULTANEOUS CRIMPING OF THE SCRIM PRODUCES A SOFT AND SOMEWHAT EXTENSIBLE FELT-LIKE FABRIC.
Inventors
- 👤 Frederick E Heinemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:07
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; B01D39/14; B01D39/16; B01D39/1607; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/48; D04H1/482; D04H1/498; B01D2239/00; B01D2239/04; B01D2239/0464; B01D2239/06; B01D2239/065; B01D2239/0654; B01D2239/0659
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |