US1490736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ore concentration
Assignee: FRANK S SINNICKS
•
Filing: 1918-12-11
•
Granted: 1924-04-15
•
Expires: 1938-12-11
Abstract
No abstract record available.
Inventors
- 👤 Fredrick Hugo Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:11
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901
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) | 1927-04-15 | 1927-10-15 | 1928-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-04-15 | 1931-10-15 | 1932-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-04-15 | 1935-10-15 | 1936-04-15 | $7700.00 | Window Closed / Lapsed |