US3598741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid compound for metal surface
Assignee: Chugai Kasei Co Ltd
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Filing: 1969-10-07
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Granted: 1971-08-10
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Expires: 1989-10-07
Abstract
Abstract COMPOSITIONS HAVING SUITABLE VISCOSITIES FOR THE CLEANING AND ETCHING OF METALS COMPRISING HYDROFLUORIC ACID, MAGNESIUM AND AT LEAST ONE ACID OR SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, PHOSPHORIC ACID, SULFURIC ACID AND SULFONIC ACID.
Inventors
- 👤 Shozo Kanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:50
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/08; C11D7/22; C11D7/34; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23G; C23G1/00; C23G1/02; C23G1/025
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |