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US3468657A
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Method for refining a metal
Assignee: Nyby Bruk AB
•
Filing: 1966-03-16
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Granted: 1969-09-23
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Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 Karl Erik Pihlblad
- 👤 Anton Robert Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:14
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/072; C21C5/00; C21C5/52; C21C7/0037; C22; C22B; C22B9/00; C22B9/05; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2826489A
Cited
US3307937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |