Patent US2832713A successfully refreshed from Google Patents.
US2832713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven sheet material
Assignee: EIDP Inc
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Filing: 1955-06-21
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Granted: 1958-04-29
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Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Ragan William Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:02
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D06; D06N; D06N3/00; D06N3/0002; D06N3/0011; D06N3/0015; D06N3/0034; D06N3/0036; D06N3/0038; D06N3/007; D06N3/0075; D06N2209/00; D06N2209/12; D06N2209/121; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/24995; Y10T428/249952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A WATER VAPOR PERMEABLE SHEET MATERIAL COMPRISING A PLURALITY OF LAYERS OF NON-WOVEN MATS OF POLYMERIC FIBERS, THE FIBERS IN THE MATS AND THE MATS BEING BOUND TOGETHER WITH AN EXTENSIBLE POLYMERIC BINDER, THE FIBERS IN THE SURFACE LAYER ONLY BEING UNDRAWN AND CRYSTALLIZED, SAID UNDRAWN AND CRYSTALLIZED FIBERS HAVING UP TO 75% OF THEIR ORIGINAL TENSILE STRENGTH PRIOR TO CRYSTALLIZATION, SAID SURFACE LAYER BEING 2% TO 33% OF THE TOTAL THICKNESS OF SAID SHEET MATERIAL, THE FIBERS IN OTHER THAN THE SURFACE LAYER OF SAID SHEET MATERIAL BEING DRAWN, AND SAID SHEET MATERIAL HAVING CHANNELS SUBSTANTIALLY CONTIGUOUS WITH A MAJOR PORTION OF THE FIBERS THROUGHOUT THE THICKNESS OF SAID SHEET MATERIAL.
Claim 2
Dependent Claim
112 words
A WATER VAPOR PERMEABLE SHEET MATERIAL COMPRISING A PLURALITY OF LAYERS OF NON-WOVEN MATS OF POLYMERIC FIBERS, THE FIBERS IN THE MATS AND THE MATS BEING BOUND TOGETHER WITH AN EXTENSIBLE POLYMERIC BINDER, THE FIBERS IN THE SURFACE LAYER ONLY BEING UNDRAWN AND CRYSTALLIZED, SAID UNDRAWN AND CRYSTALLIZED FIBERS HAVING UP TO 75% OF THEIR ORIGINAL TENSILE STRENGTH PRIOR TO CRYSTALLIZATION, SAID SURFACE LAYER BEING 2% TO 33% OF THE TOTAL THICKNESS OF SAID SHEET MATERIAL, THE FIBERS IN OTHER THAN THE SURFACE LAYER OF SAID SHEET MATERIAL BEING DRAWN, AND SAID SHEET MATERIAL HAVING CHANNELS SUBSTANTIALLY CONTIGUOUS WITH A MAJOR PORTION OF THE FIBERS THROUGHOUT THE THICKNESS OF SAID SHEET MATERIAL.
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) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |