Patent US3535222A successfully refreshed from Google Patents.
US3535222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuous electrolytic treatment
Assignee: Alcan Research and Development Ltd
•
Filing: 1967-11-14
•
Granted: 1970-10-20
•
Expires: 1987-11-14
Abstract
No abstract record available.
Inventors
- 👤 W Cooke
- 👤 D Bury
- 👤 P Smits
- 👤 J Cote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:40
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06; C25D11/08; C25D11/005; C25D21/00; C25D21/10; C25D7/00; C25D7/06; C25D7/0614
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1068411A
Cited
US1768358A
Cited
US2165326A
Cited
US2307928A
Cited
US2370973A
Cited
US2541275A
Cited
US2930739A
Cited
US3038850A
Cited
US3359190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |