US3694334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid pickling of stainless steels
Assignee: Centro Sperimentale Metallurgico SpA
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Filing: 1969-04-10
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Granted: 1972-09-26
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Expires: 1989-04-10
Abstract
Abstract A PROCESS FOR ELECTROSTATICALLY PICKLING STAINLESS STEEL HAVING A CHROMIUM-DEPLETED LAYER BENEATH THE SCALE FORMED DURING HOT-ROLLING.
Inventors
- 👤 Giuseppe A Bombara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:02
CPC Classifications
C; C25; C25F; C25F1/00; C25F1/02; C25F1/04; C25F1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |