Patent US2931818A successfully refreshed from Google Patents.
US2931818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating lecithin for freeing it of its depressor factor
Assignee: Bayer Corp
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Filing: 1957-04-29
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Granted: 1960-04-05
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Expires: 1977-04-29
Abstract
No abstract record available.
Inventors
- 👤 Ernest B Mcquarrie
- 👤 Hans P Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:01
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A METHOD OF PURIFYING LECITHIN, COMPRISING DISSOLVING LECITHIN IN A LOWER ALKANOL CONTAINING NO MORE THAN 10% WATER AND TREATING THE RESULTING ALCOHOL SOLUTION WITH AN ANION-EXCHANGE RESIN IN THE FREE BASE FORM THEREBY TOLP REMOVE THE DEPRESSOR CONTENT OF THE LECITHIN.
Claim 2
Independent Claim
42 words
A METHOD OF PURIFYING LECITHIN, COMPRISING DISSOLVING LECITHIN IN A LOWER ALKANOL CONTAINING NO MORE THAN 10% WATER AND TREATING THE RESULTING ALCOHOL SOLUTION WITH AN ANION-EXCHANGE RESIN IN THE FREE BASE FORM THEREBY TOLP REMOVE THE DEPRESSOR CONTENT OF THE LECITHIN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |