US3477931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for automatic electric corrosion-proofing
Assignee: Mitsubishi Heavy Industries Ltd
•
Filing: 1966-03-28
•
Granted: 1969-11-11
•
Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 Kenji Ueda
- 👤 Hiroshi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:26
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3129154A
Cited
US3004905A
Cited
US3143670A
Cited
US3374162A
Cited
US3360452A
Cited
US3375183A
Cited
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 |