US2864506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for ultrafiltration
Assignee: Individual
•
Filing: 1953-11-30
•
Granted: 1958-12-16
•
Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 Clarence F Hiskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:21
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/491; B; B01; B01D; B01D63/00; B01D63/06; B01D63/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1825631A
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US1843242A
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FR836733A
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FR53795E
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US2411238A
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US2650709A
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US2687997A
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GB721087A
Cited
BE517737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |