US3668085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrolytically coating lead dioxide on the surface of various materials
Assignee: Isomura Sangyo Kaisha Ltd
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Filing: 1969-08-21
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Granted: 1972-06-06
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Expires: 1989-08-21
Abstract
Abstract Lead dioxide is coated on the surface of a base electrode by electrolyzing an acidic aqueous lead nitrate solution containing a small amount of copper nitrate at a temperature not lower than 70* C. and with a current density of anode not higher than 4 A/dm2.
Inventors
- 👤 Shinzo Kiyohara
- 👤 Yasuichi Shibazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:40
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/054; C25D; C25D9/00; C25D9/04; C25D9/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
The method of claim 1, wherein the current density at the anode ranges from 3 to 4 A/dm2.
References Cited (Backward Citations)
US3213004A
Cited
US3463707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |