US2150899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for isolating minerals
Assignee: EIDP Inc
•
Filing: 1936-08-31
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Granted: 1939-03-21
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Expires: 1956-08-31
Abstract
No abstract record available.
Inventors
- 👤 Henry L Alexander
- 👤 Pont Hubert I Du
- 👤 Willing B Foulke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:56
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/36; B03B5/40; B01; B01D; B01D21/00; B01D21/02; B01D21/04; B01D21/06; B01D21/24; B01D21/2405; B01D21/2433; B01D21/245; B03B11/00; B03B5/44; B03B5/442; G; G01; G01N; G01N33/00; G01N33/22; G01N33/222; B01D2221/00; B01D2221/04; B03B2011/006; Y; Y10; Y10T; Y10T137/00; Y10T137/4673; Y10T137/4807; Y10T137/4857; Y10T137/8593; Y10T137/85954; Y10T137/86187
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) | 1942-03-20 | 1942-09-19 | 1943-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-20 | 1946-09-19 | 1947-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-20 | 1950-09-19 | 1951-03-21 | $7700.00 | Window Closed / Lapsed |