Patent US431968A successfully refreshed from Google Patents.
US431968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming porous pots for voltaic batteries
Assignee: —
•
Filing: —
•
Granted: 1890-07-08
•
Expires: 1907-07-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:30
CPC Classifications
G; G04; G04B; G04B37/00; G04B37/08; G04B37/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1893-07-07 | 1894-01-06 | 1894-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-07-07 | 1898-01-06 | 1898-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-07-08 | 1902-01-07 | 1902-07-09 | $7700.00 | Window Closed / Lapsed |