US2952360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral concentrator apparatus
Assignee: International Minerals and Chemical Corp
•
Filing: 1955-10-25
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Granted: 1960-09-13
•
Expires: 1975-10-25
Abstract
No abstract record available.
Inventors
- 👤 Fred N Oberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/62; B03B5/626; B03D; B03D1/00; B03D1/02; B03D1/021; B03D1/14; B03D1/1418; B03D1/1443; B03D1/1462; B03D1/1493; B03D1/24; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US884830A
Cited
US2308077A
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US2431559A
Cited
US2615572A
Cited
US2639906A
Cited
US2646882A
Cited
US2711822A
Cited
US2850164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |