Patent US4795227A successfully refreshed from Google Patents.
Patent US3223581A successfully refreshed from Google Patents.
US3223581A
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US
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Process for the production of a sheet of synthetic polymer fibrous material
Assignee: Glanzstoff AG
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Filing: 1962-11-27
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Granted: 1965-12-14
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Expires: 1982-11-27
Abstract
No abstract record available.
Inventors
- 👤 Sommer Erwin
- 👤 Gerlach Klaus
- 👤 Werner Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:50
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253; D21; D21H; D21H5/00; D21H5/12; D21H5/20; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A PROCESS FOR THE PRODUCTION OF A SHEET OF SYNTHETIC POLYMER FIBROUS MATERIAL WHEREIN AN AQUEOUS DISPERSION OF SYNTHETIC POLYMER FIBERS IS TRANSFERRED TO A SUPPORTING SURFACE, WATER IS WITHDRAWN TO FORM A FIBROUS WEB ON SAID SUPPORTING SURFACE, AND THE WEB IS THEN REMOVED FROM SAID SUPPORTING SURFACE AND FORMED INTO A BONDED SHEET OF FIBROUS MATERIAL, THE IMPROVEMENT WHICH COMPRISES: FORMING A FIBROUS WEB ON SAID SUPPORTING SURFACE WITH INDIVIDUAL FIBERS WHICH CONSIST PREDOMINANTLY OF MELT-SPUN, NON-FIBRILLATED SYNTHETIC POLYMER STRANDS, EACH OF SAID STRANDS HAVING A SOLID ELONGATED CROSS-SECTION IN WHICH THE RATIO OF MIXIMUM LENGTH
Claim 2
Dependent Claim
99 words
IN A PROCESS FOR THE PRODUCTION OF A SHEET OF SYNTHETIC POLYMER FIBROUS MATERIAL WHEREIN AN AQUEOUS DISPERSION OF SYNTHETIC POLYMER FIBERS IS TRANSFERRED TO A SUPPORTING SURFACE, WATER IS WITHDRAWN TO FORM A FIBROUS WEB ON SAID SUPPORTING SURFACE, AND THE WEB IS THEN REMOVED FROM SAID SUPPORTING SURFACE AND FORMED INTO A BONDED SHEET OF FIBROUS MATERIAL, THE IMPROVEMENT WHICH COMPRISES: FORMING A FIBROUS WEB ON SAID SUPPORTING SURFACE WITH INDIVIDUAL FIBERS WHICH CONSIST PREDOMINANTLY OF MELT-SPUN, NON-FIBRILLATED SYNTHETIC POLYMER STRANDS, EACH OF SAID STRANDS HAVING A SOLID ELONGATED CROSS-SECTION IN WHICH THE RATIO OF MIXIMUM LENGTH
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |