US3476737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for separating substances of different molecular sizes from a viscous solution of said substances
Assignee: Cytiva Sweden AB
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Filing: 1967-04-14
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Granted: 1969-11-04
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Expires: 1987-04-14
Abstract
No abstract record available.
Inventors
- 👤 Nils Ingvar Arne Emneus
- 👤 Erik B Gelotte
- 👤 Nils G Rehn
- 👤 Bjorn G F Soderqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:49
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/291; B01J2220/00; B01J2220/50; B01J2220/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3002823A
Cited
US3326875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |