US3148141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the purification of high molecular solutions
Assignee: Siemens Healthcare Diagnostics GmbH Germany
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Filing: 1961-07-06
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Granted: 1964-09-08
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Expires: 1981-07-06
Abstract
No abstract record available.
Inventors
- 👤 Schonenberger Max
- 👤 Erbach Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/14; B01D61/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
A PROCESS FOR THE PURIFICATION OF HIGH MOLECULAR SOLUTIONS FROM LOW MOLECULAR WEIGHT COMPOUNDS, WHEREIN THE HIGH MOLECULAR SOLUTION ARE FIRST CONCENTRATED BY ULTRA-FILTRATION, THEN DILUTED TO A HIGHER VOLUME BY ADDI-
References Cited (Backward Citations)
US2127791A
Cited
US2864506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |