US2768751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for filtration with finely divided filtering material
Assignee: US Filter Wallace and Tiernan Inc
•
Filing: 1951-02-10
•
Granted: 1956-10-30
•
Expires: 1971-02-10
Abstract
No abstract record available.
Inventors
- 👤 George M Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:47
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/48; B01D29/11; B01D29/111; B01D29/50; B01D29/56; B01D29/58; B01D29/62; B01D29/66; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US87385A
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US1631585A
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US1677118A
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US1341187A
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US1629018A
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US1663298A
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US2115122A
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US2267752A
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US2272175A
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US2342914A
Cited
US2419155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |