US4091137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous nonwoven film-fibril sheet having optical transmission properties
Assignee: EIDP Inc
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Filing: 1974-05-03
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Granted: 1978-05-23
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Expires: 1994-05-03
Abstract
Abstract A lightweight, abrasion resistant nonwoven film-fibril sheet of thermoplastic polymer embossed over substantially the entire area of at least one surface with a pattern comprising from 50 to 1000 small fused regions per square inch which in the aggregate represent from 3 to 25% of the total area of the surface of the sheet, said embossed regions having an average optical transmission of at least 50% and a method of making such sheets.
Inventors
- 👤 Philip Eugene Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:27
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24479; Y10T428/24802; Y10T428/24826; Y10T428/27
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
66 words
A lightweight, abrasion resistant nonwoven film-fibril sheet of thermoplastic polymer embossed over substantially the entire area of at least one surface with a pattern comprising from 50 to 1000 small fused regions per square inch which in the aggregate represent from 3 to 25% of the total area of the surface of the sheet, said embossed regions having an average optical transmission of at least 50%.
Claim 2
Dependent Claim
66 words
A lightweight, abrasion resistant nonwoven film-fibril sheet of thermoplastic polymer embossed over substantially the entire area of at least one surface with a pattern comprising from 50 to 1000 small fused regions per square inch which in the aggregate represent from 3 to 25% of the total area of the surface of the sheet, said embossed regions having an average optical transmission of at least 50%.
Claim 3
Dependent Claim
17 words
The sheet of claim 1 having a basis weight of from 0.3 to 1.3 oz/yd 2 .
Claim 4
Dependent Claim
17 words
The sheet of claim 1 having a basis weight of from 0.6 to 1.15 oz/yd 2 .
Claim 5
Dependent Claim
10 words
The sheet of claim 1 wherein the polymer is polyethylene.
Claim 6
Dependent Claim
95 words
An abrasion-resistant nonwoven fibrous sheet having a basis weight of from about 0.3 to 1.3 oz./yd. 2 and being of improved uniformity of visual appearance, said sheet comprising continuous networks of film-fibril elements of olefin polymer, and being embossed over substantially the entire area of at least one surface thereof with a pattern comprising from 50 to 1,000 small fused regions per square inch which in the aggregate represent from 3 to 25% of the total area of the surface of the sheet, said embossed regions having an average optical transmission of at least 50%.
Claim 7
Dependent Claim
95 words
An abrasion-resistant nonwoven fibrous sheet having a basis weight of from about 0.3 to 1.3 oz./yd. 2 and being of improved uniformity of visual appearance, said sheet comprising continuous networks of film-fibril elements of olefin polymer, and being embossed over substantially the entire area of at least one surface thereof with a pattern comprising from 50 to 1,000 small fused regions per square inch which in the aggregate represent from 3 to 25% of the total area of the surface of the sheet, said embossed regions having an average optical transmission of at least 50%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |