US1658872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic apparatus
Assignee: Individual
•
Filing: 1925-01-16
•
Granted: 1928-02-14
•
Expires: 1945-01-16
Abstract
No abstract record available.
Inventors
- 👤 Henry J Yeager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:08
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/45; B01F33/451; C; C25; C25D; C25D21/00; C25D21/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-02-13 | 1931-08-15 | 1932-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-02-13 | 1935-08-15 | 1936-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-02-13 | 1939-08-15 | 1940-02-14 | $7700.00 | Window Closed / Lapsed |