Patent US3735425A successfully refreshed from Google Patents.
US3510418A
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US
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Ion selective membrane
Assignee: Tokuyama Corp
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Filing: 1967-02-20
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Granted: 1970-05-05
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Expires: 1987-02-20
Abstract
No abstract record available.
Inventors
- 👤 Yukio Mizutani
- 👤 Reiichi Yamane
- 👤 Toshikatsu Sata
- 👤 Ryuji Izuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:49
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0093; B01D67/00933; B01D67/0088; B01D69/00; B01D69/02; B01D71/00; B01D71/06; B01D71/66; C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2287; C08J2339/00; C08J2339/04; C08J2339/08
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) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |