US2982625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etchant and method
Assignee: GTE Sylvania Inc
•
Filing: 1957-03-22
•
Granted: 1961-05-02
•
Expires: 1977-03-22
Abstract
No abstract record available.
Inventors
- 👤 Edward B Saubestre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:01
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/18; H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/067
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
AN IMPROVED ETCHANT FOR COPPER AND COPPER ALLOYS CONSISTING OF A MIXTURE OF CHROMIC AND SULFURIC ACIDS CONTAINING PEROXYSULFATE IONS.
Claim 2
Dependent Claim
20 words
AN IMPROVED ETCHANT FOR COPPER AND COPPER ALLOYS CONSISTING OF A MIXTURE OF CHROMIC AND SULFURIC ACIDS CONTAINING PEROXYSULFATE IONS.
Claim 3
Independent Claim
38 words
A METHOD OF ETCHING COPPER AND COPPER ALLOYS CONSISTING OF PLACING SAID COPPER OR COPPER ALLOY IN A MIXTURE OF CHROMIC AND SULFURIC ACIDS CONTAINING PEROXYSULFATE IONS SELECTED FROM THE GROUP CONSISTING OF PEROXYSULFATE SALTS AND PEROXYSULFURIC ACID.
Claim 4
Independent Claim
38 words
A METHOD OF ETCHING COPPER AND COPPER ALLOYS CONSISTING OF PLACING SAID COPPER OR COPPER ALLOY IN A MIXTURE OF CHROMIC AND SULFURIC ACIDS CONTAINING PEROXYSULFATE IONS SELECTED FROM THE GROUP CONSISTING OF PEROXYSULFATE SALTS AND PEROXYSULFURIC ACID.
References Cited (Backward Citations)
US1106107A
Cited
US1878895A
Cited
US2154455A
Cited
US2172171A
Cited
US2650156A
Cited
FR1000938A
Cited
US2678876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |