US2284737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating liquids of different specific gravities
Assignee: MILDRED HIRSHSTEIN
•
Filing: 1938-10-04
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Granted: 1942-06-02
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Expires: 1958-10-04
Abstract
No abstract record available.
Inventors
- 👤 Hirshstein Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:41
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/003; B01D17/00; B01D17/02; B01D17/0208; B01D17/0211; B01D17/0214; B01D21/0039; B01D21/0042; C; C11; C11B; C11B13/00; E; E03; E03F; E03F5/00; E03F5/14; E03F5/16; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/74
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) | 1945-06-01 | 1945-12-01 | 1946-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-01 | 1949-12-01 | 1950-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-01 | 1953-12-01 | 1954-06-02 | $7700.00 | Window Closed / Lapsed |