Patent JPS54160104A successfully refreshed from Google Patents.
US3484273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making porous sheet material
Assignee: Kanebo Ltd
•
Filing: 1967-01-04
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Granted: 1969-12-16
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Expires: 1987-01-04
Abstract
No abstract record available.
Inventors
- 👤 Shigeru Kawase
- 👤 Tohru Kitazawa
- 👤 Hiroo Ohba
- 👤 Kojiro Sagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:14
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3322568A
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US3296016A
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US3369925A
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US3387989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |