Patent US3065191A successfully refreshed from Google Patents.
Patent US3534531A successfully refreshed from Google Patents.
US3534531A
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Assembly of pure gas permeating separator
Assignee: Japan Pure Hydrogen Co Ltd
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Filing: 1968-07-03
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Granted: 1970-10-20
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Expires: 1988-07-03
Abstract
No abstract record available.
Inventors
- 👤 Takashi Eguchi
- 👤 Teruchika Taura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D63/00; B01D63/08; B01D63/087; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0251; C01B13/0255; C01B21/00; C01B21/04; C01B21/0405; C01B21/0433; C01B21/0438; C01B21/0444; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B3/505; B01D2313/00; B01D2313/14; B01D2313/18; B01D2313/42; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/0465; C01B2210/00; C01B2210/0042
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) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |