US2431870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material for use in tumbling barrel polishing operations
Assignee: Crown Rheostat & Supply Co
•
Filing: 1944-11-06
•
Granted: 1947-12-02
•
Expires: 1964-11-06
Abstract
No abstract record available.
Inventors
- 👤 George E Huenerfauth
- 👤 Fred P Green
- 👤 George J Yochim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:58
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/12; B24B31/14; B02; B02C; B02C17/00; B02C17/18; B02C17/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1682246A
Cited
US970373A
Cited
US983028A
Cited
GB191229418A
Cited
US1133368A
Cited
US1431475A
Cited
US1531275A
Cited
US1585663A
Cited
US2318580A
Cited
US2318581A
Cited
US2355171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |