Patent US3383324A successfully refreshed from Google Patents.
US3383324A
Expired / Lapsed
US
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Process for recovering acid values from mixed waste acid used for pickling
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1965-09-20
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Granted: 1968-05-14
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Hiwatashi Yukinori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:46
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/36; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2185095A
Cited
US2296118A
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US2738322A
Cited
US2975029A
Cited
US3205168A
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US3306702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |