US3425918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolyte for the production of selfcolored anodic oxide layers on aluminum and aluminum alloys
Assignee: Rio Tinto Switzerland AG
•
Filing: 1966-11-07
•
Granted: 1969-02-04
•
Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 Walter Zweifel
- 👤 Fritz Schneeberger
- 👤 Alfred Marquetant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:41
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |