Article with a multicolored surface decoration thereon produced by light interference effects
Abstract
Abstract A polychromatic image is formed on the surface of an article by depositing on a solid dielectric layer a thin film of a unilaterally-conducting metal or alloy thereof to a thickness of at least 500 A, followed by dividing the film into separate areas in conformity with the shape of the picture to be reproduced, the areas being electrically insulated from one another. Thereafter the areas are subjected to selective anodic oxidation at a constant current density of less than 10 mA/cm2 and at working voltages which vary from one area to another in a range of 5 to 250 volts to produce transparent anodic oxide films on the areas of thicknesses between 100 to 6,000 A, to impart different coloration to the areas by light interference phenomena.
Inventors
- 👤 N Rjumshina
- 👤 G Vasiliev
- 👤 G Vozlinsky
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |