US3810797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum etch bath additive
Assignee: OXFORD CHEMICALS Inc A DE CORP
•
Filing: 1972-04-10
•
Granted: 1974-05-14
•
Expires: 1992-04-10
Abstract
Abstract THE PROCESS FOR ETCHING ALUMINIUM USING A CAUSTIC SODA BATH UTILIZING PEROXIDE COMPOUND AS AN ADDITIVE TO REDUCE THE ADVERSE APPEARANCE ON THE SURFACE AFTER VISCOSITY OF THE BATH ASSOCIATED WITH DISSOLVED ALUMINUM BAS REACHED A CERTAIN LEVEL. THE PEROXIDE COMPOUND ADDITIVES ARE WATER-SOLUBLE AND INCLUDE HYDROGEN PEROXIDE, HYDRATES OF HYDROGEN PEROXIDE, AND ALKALI METAL AND AMMONIUM SALTS OF PERBORATE, PERCARBONATE AND PERSULFATE.
Inventors
- 👤 E Schaffstall
- 👤 I Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:13
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |