US3669792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of vapor permeable sheet-like materials
Assignee: Toray Industries Inc
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Filing: 1968-10-14
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Granted: 1972-06-13
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Expires: 1988-10-14
Abstract
Abstract A PROCESS FOR PRODUCING VAPOR PERMABLE SHEET-LIKE MATERIALS WHICH COMPRISES COATING A SOLUTION OF A FILMFORMING POLYMERIC MATERIAL ON A SUPPORT MATERIAL, AND APPLYING A GAS STREAM AT A FLOW RATE OF FROM 1 METER PER SECOND TO 50 METERS PER SECOND ON THE COATED SURFACE, UNTIL A DENSE GELATED LAYER FORMS ON THE SURFACE WHEN THE COATED MATERIAL IS THEREAFTER SUBJECTED TO A COAGULATING STEP. THE VAPOR PERMABLE SHEET-LIKE MATERIAL IS FINALLY COAGULATED.
Inventors
- 👤 Konosuke Mitsukawa
- 👤 Hiroshi Hattori
- 👤 Toyohiko Hikoda
- 👤 Yoshinori Masubuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:08
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/04; D06N3/06; D06N3/0086; D06N3/12; D06N3/14; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T442/00; Y10T442/20; Y10T442/2139
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |