Patent US1712404A successfully refreshed from Google Patents.
US1712404A
Expired / Lapsed
US
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Mineral feed and process of making same
Assignee: Individual
•
Filing: 1928-01-27
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Granted: 1929-05-07
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Expires: 1948-01-27
Abstract
No abstract record available.
Inventors
- 👤 Virgil R Rupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:07
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/324; Y; Y10; Y10S; Y10S426/00; Y10S426/806; Y10S426/807
Claims Analysis
Total Claims: 0
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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) | 1932-05-06 | 1932-11-05 | 1933-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-05-06 | 1936-11-05 | 1937-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-05-06 | 1940-11-05 | 1941-05-07 | $7700.00 | Window Closed / Lapsed |