US1585756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of minerals
Assignee: New Jersey Zinc Co
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Filing: 1922-12-11
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Granted: 1926-05-25
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Expires: 1942-12-11
Abstract
No abstract record available.
Inventors
- 👤 Walter O Borcherdt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:42
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06
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) | 1929-05-24 | 1929-11-23 | 1930-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-05-24 | 1933-11-23 | 1934-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-05-24 | 1937-11-23 | 1938-05-25 | $7700.00 | Window Closed / Lapsed |