US3481765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing sheet materials having a good gas permeability
Assignee: Kuraray Co Ltd
•
Filing: 1967-02-21
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Granted: 1969-12-02
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Expires: 1987-02-21
Abstract
No abstract record available.
Inventors
- 👤 Shogo Nakajo
- 👤 Shiro Sano
- 👤 Kazuo Nagoshi
- 👤 Katsutoshi Hosoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:06
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14
Claims Analysis
Total Claims: 0
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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) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |