US2909456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven sheet material
Assignee: EIDP Inc
•
Filing: 1955-07-27
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Granted: 1959-10-20
•
Expires: 1975-07-27
Abstract
No abstract record available.
Inventors
- 👤 Graham Boynton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:49
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/593; D06; D06N; D06N3/00; D06N3/0002; D06N3/0011; D06N3/0015; D06N3/0034; D06N3/0036; D06N3/007; D06N3/0075; D06N3/04; D06N3/10; D06N3/106; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A PROCESS FOR PREPARING PERMEABLE SHEET MATERIAL WHICH COMPRISES PLYING A PLURALITY OF NON-WOVEN MATS OF NYLON FIBERS SUBSTANTIALLY GREATER THAN .01 INCH IN LENGTH, SUPERPOSING OVER SAID MATS A SURFACE LAYER OF A NON-WOVEN MAT OF POLEYTHLENE TEREPHTHALATE FIBERS AVERAGING ABOUT 0.01 INCH IN LENGTH; CONTACTING SAID MATS WITH A NEOPRENE BINDER; HOT PRESSING THE MATS IN CONTACT WITH THE BINDER TO FORM A COMPACTED STRUCTURE; STRETCHING THE STRUCTURE 10% TO 50% IN AT LEAST ONE DIRECTION TO FORM CHANNELS SUBSTANTIALLY CONTIGUOUS WITH A MAJOR PORTION OF THE FIBERS; AND ABRADING THE RESULTING STRUCTURE.
References Cited (Backward Citations)
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US1427754A
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US1694258A
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US1787680A
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US2336797A
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US2719806A
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US2725309A
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US2650213A
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US2757100A
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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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |