US3477929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of etching aluminum foil in the manufacturing of aluminum electrolytic condensers
Assignee: Fujitsu Ltd
•
Filing: 1967-04-14
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Granted: 1969-11-11
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Expires: 1987-04-14
Abstract
No abstract record available.
Inventors
- 👤 Takeshi Namikata
- 👤 Kazuo Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:28
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/055; C; C25; C25F; C25F3/00; C25F3/02; C25F3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2721835A
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US2755238A
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US3085950A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |