US3214264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of metal oxides
Assignee: Huettenwerk Oberhausen AG
•
Filing: 1963-03-14
•
Granted: 1965-10-26
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Expires: 1983-03-14
Abstract
No abstract record available.
Inventors
- 👤 Bogdandy Ludwig Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:16
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0046; C21B13/0053; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1832731A
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GB364699A
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US2445648A
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US2511400A
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US2577730A
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US2750272A
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US3005699A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |