US3674541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum plating process
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1970-10-26
•
Granted: 1972-07-04
•
Expires: 1990-10-26
Abstract
Abstract ALUMINUM PLATING ACCORDING TO WHICH ALUMINUM FILM FORMED HAS NO CRACKS AND PIN-HOLES, A UNIFORM THICKNESS AND EXCELLENT SURFACE LUSTER CAN BE ATTAINED BY CONTACTING A SUBSTRATE COVERED WITH ALUMINUM WITH A SMALL AMOUNT OF A SURFACE TREATING AGENT SELECTED FROM ACTIVE HYDROGENCONTAINING COMPOUNDS, OXYGEN AND HALOGENS AND THEREAFTER TAKING OUT THUS TREATED SUBSTRATE INTO THE AIR.
Inventors
- 👤 Eiichi Ichiki
- 👤 Kazuo Iida
- 👤 Yasuhiko Inoue
- 👤 Yoshihiro Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:50
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/56; C23C10/00; C23C10/18; C23C10/20; C23C2/00; C23C2/04; C23C2/12; C23C22/00; C23C22/02
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |