US3383324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering acid values from mixed waste acid used for pickling
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1965-09-20
•
Granted: 1968-05-14
•
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 03:35
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/36; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2185095A
Cited
US2296118A
Cited
US2738322A
Cited
US2975029A
Cited
US3205168A
Cited
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 |