Patent US2659853A successfully refreshed from Google Patents.
Patent US2446060A successfully refreshed from Google Patents.
US2446060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical polishing of metal surfaces
Assignee: Battelle Development Corp
•
Filing: 1944-07-04
•
Granted: 1948-07-27
•
Expires: 1964-07-04
Abstract
No abstract record available.
Inventors
- 👤 Pray Henry A Holden
- 👤 Igelsrud Iver
- 👤 Gerald L Simard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:36
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/04; C23F3/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB174489A
Cited
US1816837A
Cited
US1919624A
Cited
US1939241A
Cited
US2070487A
Cited
GB489211A
Cited
US2172171A
Cited
US2238778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |