Patent US2431870A successfully refreshed from Google Patents.
US2431870A
Expired / Lapsed
US
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Material for use in tumbling barrel polishing operations
Assignee: Crown Rheostat & Supply Co
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Filing: 1944-11-06
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Granted: 1947-12-02
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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
2026-10-29 18:42
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/12; B24B31/14; B02; B02C; B02C17/00; B02C17/18; B02C17/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1682246A
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US970373A
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US983028A
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GB191229418A
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US1133368A
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US1431475A
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US1531275A
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US1585663A
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US2318580A
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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 |