US3469372A
Expired / Lapsed
US
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Hydrogen permeable membrane and hydrogen permeating assembly
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1966-06-13
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Granted: 1969-09-30
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Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Saburo Yamauchi
- 👤 Teruchika Taura
- 👤 Yuzuru Isogai
- 👤 Hideki Seino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:13
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D63/00; B01D63/08; B01D63/087; B01D71/00; B01D71/02; B01D71/022; B01D71/0223; B01D71/02231; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B3/505; B01D2325/00; B01D2325/04; B01D2325/06; B01D2325/22
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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |