Patent US2901112A successfully refreshed from Google Patents.
US2901112A
Expired / Lapsed
US
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Combining tube and filter therefor
Assignee: MICHAEL REESE RES FOUNDATION I
•
Filing: 1957-05-10
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Granted: 1959-08-25
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Expires: 1977-05-10
Abstract
No abstract record available.
Inventors
- 👤 Naftulin Henry
- 👤 Egge Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
B; B01; B01D; B01D35/00; B01F; B01F25/00; B01F25/20; B01F25/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA521205A
Cited
US662509A
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US2203072A
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US2586513A
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US2697521A
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US2709279A
Cited
US2701565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |