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US3549398A
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US
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Method for manufacturing water-vapor permeable,synthetic,suede-like,material
Assignee: Celanese Corp
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Filing: 1967-04-03
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Granted: 1970-12-22
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Expires: 1987-04-03
Abstract
No abstract record available.
Inventors
- 👤 George A Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:32
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/0043; D06N3/0052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2448316A
Cited
US2774679A
Cited
US2811464A
Cited
DE1058011B
Cited
US2837440A
Cited
US3067483A
Cited
US3287196A
Cited
US3337388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |