US3920874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Softened fibrillated sheet
Assignee: EIDP Inc
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Filing: 1975-02-21
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Granted: 1975-11-18
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Expires: 1995-02-21
Abstract
Abstract A nonwoven sheet of fibrillated organic polymer material is softened by passage through the nip formed between two parallel rolls each bearing a multiplicity of square-ended pegs, the locus of the ends of all pegs on each roll lying on a cylinder whose axis coincides with the roll axis, the said rolls being engaged such that an array of pegs of one roll interpenetrates an array of pegs on the opposite roll by an amount that is at least equal to the thickness of the nonwoven sheet.
Inventors
- 👤 James J Dempsey
- 👤 Drexel Kermit Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:24
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24488; Y10T428/24521; Y10T428/24529; Y10T428/24612; Y10T428/24802; Y10T428/24826; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
A SOFTENED NONWOVEN SHEET OF FIBRILLATED ORGANIC POLYMERIC MATERIAL, SAID SHEET HAVING A SHEET PATTERN OF SPACED SUBSTANTIALLY CONTINUOUS CLOSED PATHS OF FUSED ABUTTING INDIVIDUL FILM FIBRIL ELEMENTS SURROUNDING SUBSTANTIALLY UNFUSED REGIONS IN THE INTERIOR OF THE PATHS.
Claim 2
Dependent Claim
38 words
A SOFTENED NONWOVEN SHEET OF FIBRILLATED ORGANIC POLYMERIC MATERIAL, SAID SHEET HAVING A SHEET PATTERN OF SPACED SUBSTANTIALLY CONTINUOUS CLOSED PATHS OF FUSED ABUTTING INDIVIDUL FILM FIBRIL ELEMENTS SURROUNDING SUBSTANTIALLY UNFUSED REGIONS IN THE INTERIOR OF THE PATHS.
Claim 3
Dependent Claim
12 words
The prOduct of claim 1 wherein the sheet additionally contains point-bonded areas.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |