Patent US2487574A successfully refreshed from Google Patents.
US2487574A
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Chromatographic adsorption
Assignee: Distillation Products Inc
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Filing: 1945-09-26
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Granted: 1949-11-08
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Expires: 1965-09-26
Abstract
No abstract record available.
Inventors
- 👤 Karl H Meng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:15
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B01D15/1864; B01D15/1871; B01D15/1885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US575478A
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US590868A
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US1246850A
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US2123785A
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US2272964A
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US2418837A
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GB568269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |