Patent US1541947A successfully refreshed from Google Patents.
US1541947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell
Assignee: Electric Water Sterilizer & Oz
•
Filing: 1922-03-21
•
Granted: 1925-06-16
•
Expires: 1942-03-21
Abstract
No abstract record available.
Inventors
- 👤 Frank E Hartman
- 👤 Hartman Harry Buxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:06
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/463; C02F1/46104; C02F1/46109; C02F1/467; C02F1/4672; C02F2001/46128; C02F2001/46133; C02F2001/46152; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4611
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) | 1928-06-15 | 1928-12-15 | 1929-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-15 | 1932-12-15 | 1933-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-15 | 1936-12-15 | 1937-06-16 | $7700.00 | Window Closed / Lapsed |