Patent US3400546A successfully refreshed from Google Patents.
US3400546A
Expired / Lapsed
US
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Hydrogen production and enrichment
Assignee: Linde GmbH
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Filing: 1965-06-18
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Granted: 1968-09-10
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Expires: 1985-06-18
Abstract
No abstract record available.
Inventors
- 👤 Karwat Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:56
CPC Classifications
F; F25; F25J; F25J5/00; C; C01; C01B; C01B3/00; C01B3/50; C01B3/506; C10; C10G; C10G5/00; C10G5/06; C01B2203/00; C01B2203/04; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/048; C01B2203/0485; C01B2203/0495; F25J2210/00; F25J2210/18; Y; Y10; Y10S; Y10S62/00; Y10S62/931
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2071763A
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US2460859A
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US2827775A
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US3143406A
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US3073128A
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US3071453A
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US3214925A
Cited
US3271110A
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US3182461A
Cited
US3264831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |