US3821062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonwoven polypropylene fabric
Assignee: Van Dorn Co
•
Filing: 1972-02-16
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Granted: 1974-06-28
•
Expires: 1992-02-16
Abstract
Abstract A length of layered nonwoven bonded continuous filament isotactic polypropylene fabric having a high level of unlatexed tear strength at a reasonable level of neckdown and which retains a high proportion of this tear resistance even after latexing.
Inventors
- 👤 W Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:39
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H3/00; D04H3/02; B32B5/02; B32B5/022; B32B5/12; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2471/00; B32B2471/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
The product of claim 1 wherein the amount of binder fiber in the machine direction layer is at least 1.2X the amount of binder fiber in the cross-machine direction layer.
Claim 2
Dependent Claim
25 words
The fabric of claim 1 having a machine direction layer at one surface and a cross-machine directiOn layer at the other surface of the fabric.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |