Patent US2521334A successfully refreshed from Google Patents.
US2521334A
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Device for treating liquids and emulsions
Assignee: Individual
•
Filing: 1946-07-11
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Granted: 1950-09-05
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Expires: 1966-07-11
Abstract
No abstract record available.
Inventors
- 👤 Murk Boerstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:08
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; A; A47; A47J; A47J27/00; A47J27/04; B; B01; B01F; B01F21/00; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23121; B01F23/40; B01F23/45; B01F25/00; B01F25/20; B01F25/21; B01F25/212; B01F25/2123; B01F33/00; B01F33/40; B01F33/405; B01F35/00; B01F35/90; B01F35/91; D; D06; D06F; D06F17/00; D06F17/12; B01F2035/99; B01F23/237; B01F23/2376; B01F23/23767; B01F23/41; B01F23/50; B01F23/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US638046A
Cited
US793786A
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FR454246A
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US1198519A
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US1431431A
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US1518595A
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US2241337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |