Patent US3448561A successfully refreshed from Google Patents.
US3448561A
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Adsorbent fractionator with automatic cycle control and process
Assignee: Pall Corp
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Filing: 1967-09-05
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Granted: 1969-06-10
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Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Chesterfield Franklin Seibert
- 👤 Marcel G Verrando Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:33
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/30; F26B21/33; F26B21/331; B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0454; B01D53/26; B01D53/261; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40088; B01D2259/40096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA683198A
Cited
US2211162A
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US2703628A
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US2882244A
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US3085379A
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US3176444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |