Patent US3418220A successfully refreshed from Google Patents.
US3418220A
Expired / Lapsed
US
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Electrodeposition of chromium and duplex micro-crack chromium coatings
Assignee: Individual
•
Filing: 1964-08-18
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Granted: 1968-12-24
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Expires: 1984-08-18
Abstract
No abstract record available.
Inventors
- 👤 Roggendorf Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:41
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA654782A
Cited
US1985308A
Cited
US2686756A
Cited
US2800443A
Cited
GB798590A
Cited
DE1106575B
Cited
US2962428A
Cited
US2952590A
Cited
US3157585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |