US3554789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of vapour permeable microporous structures and structures obtained by the process
Assignee: Teijin Ltd
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Filing: 1967-11-06
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Granted: 1971-01-12
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Expires: 1987-11-06
Abstract
Abstract PROCESS FOR PREPARING A VAPOUR PERMEABLE MICROPOROUS STRUCTURE IN WHICH A COATING OF A DISPERSION OF A POLYURETHANE AND AN AQUEOUS EMULSION OF A POLYMER IS APPLIED TO THE SURFACE OF A SUBSTRATE AND DRIED. A MICROPOROUS STRUCTURE WHICH HAS A HIGH VELOCITY OF VAPOUR PREMEABILITY IS PRODUCED.
Inventors
- 👤 Koji Kigane
- 👤 Nobuji Ishihara
- 👤 Kazuo Koga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:53
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; D06N3/142; C; C08; C08J; C08J9/00; C08J9/28; C08J2201/00; C08J2201/04; C08J2201/05; C08J2201/0502; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978
Claims Analysis
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |