US2730435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of etching metals
Assignee: Individual
•
Filing: 1954-10-04
•
Granted: 1956-01-10
•
Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robert W Michler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:52
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/22; C; C23; C23F; C23F1/00; C23F1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF ETCHING A METAL OF THE GROUP CONSISTING OF FERROUS METALS, ALUMINUM, AND ALUMINUM ALLOYS WHICH CONSISTS OF APPLYING A THIN FILM OF OZOKERITE TO THE ARTUCKE TO BE WTCHED, APPLYING THEREOVER A THIN FILM OF GILSONITE, APPLYING A DIE TO THE TWO LAYERS TO EXTRACT FROM THE GROUND PRODUCED THEREBY PORTIONS OF THE GROUND IN CONFORMITY WITH THE SHAPE OF THE DIE, APPLYING TO THE GROUND AND THAT PORTION OF THE METAL EXPOSED BY THE REMOVAL OF A PORTION OF THE GROUP A SOLUTION OF A METALLIC SALT CAPABLE OF HAVING AN IONIC EXCHANGE WITH THE METAL OF THE ARTICLE TO BE ETECHED, RENDERING INACTIVE THE SOLUTION OF THE METALLIC SALT AND REMOVING THE GROUND AND THE DEPOSITED METAL FROM THE METAL THUS ETCHED.
Claim 2
Independent Claim
127 words
THE METHOD OF ETCHING A METAL OF THE GROUP CONSISTING OF FERROUS METALS, ALUMINUM, AND ALUMINUM ALLOYS WHICH CONSISTS OF APPLYING A THIN FILM OF OZOKERITE TO THE ARTUCKE TO BE WTCHED, APPLYING THEREOVER A THIN FILM OF GILSONITE, APPLYING A DIE TO THE TWO LAYERS TO EXTRACT FROM THE GROUND PRODUCED THEREBY PORTIONS OF THE GROUND IN CONFORMITY WITH THE SHAPE OF THE DIE, APPLYING TO THE GROUND AND THAT PORTION OF THE METAL EXPOSED BY THE REMOVAL OF A PORTION OF THE GROUP A SOLUTION OF A METALLIC SALT CAPABLE OF HAVING AN IONIC EXCHANGE WITH THE METAL OF THE ARTICLE TO BE ETECHED, RENDERING INACTIVE THE SOLUTION OF THE METALLIC SALT AND REMOVING THE GROUND AND THE DEPOSITED METAL FROM THE METAL THUS ETCHED.
References Cited (Backward Citations)
US378423A
Cited
US2556626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |