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Patent US3518172A successfully refreshed from Google Patents.
US3518172A
Expired / Lapsed
US
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Process for the electrolysis of aluminum chloride
Assignee: Dow Chemical Co
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Filing: 1967-02-24
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Granted: 1970-06-30
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Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Gilbert S Layne
- 👤 James O Huml
- 👤 Richard Dale Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:06
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |