Patent US4692280A successfully refreshed from Google Patents.
US4692280A
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Purification of fish oils
Assignee: United States, COMMERCE THE, Secretary of
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Filing: 1986-12-01
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Granted: 1987-09-08
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Expires: 2006-12-01
Abstract
Abstract Fish oil is purified by extraction with supercritical carbon dioxide.
Inventors
- 👤 John Spinelli
- 👤 Virginia F. Stout
- 👤 William B. Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:19
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
67 words
A process for the purification of fish oil which comprises extracting the fish oil with supercritical carbon dioxide at a pressure of 1070 to 10,000 psi and at a temperature of 35° C. to 95° C. first to remove odoriferous and volatile impurities present in the fish oil and then with additional supercritical carbon dioxide to separate lightly colored fish oil from a more darkly colored residue.
Claim 2
Dependent Claim
67 words
A process for the purification of fish oil which comprises extracting the fish oil with supercritical carbon dioxide at a pressure of 1070 to 10,000 psi and at a temperature of 35° C. to 95° C. first to remove odoriferous and volatile impurities present in the fish oil and then with additional supercritical carbon dioxide to separate lightly colored fish oil from a more darkly colored residue.
Claim 3
Dependent Claim
48 words
A process according to claim 1, wherein the lightly colored fish oil is extracted with a further portion of supercritical oxide to remove odoriferous and volatile impurities and then with a further portion of supercritical carbon dioxide to separate almost colorless fish oil from a darker colored residue.
Claim 4
Dependent Claim
133 words
A process according to claim 1, wherein the fish oil is menhaden oil; albacore, skipjack, yellowfin, bluefin, and other tuna cooker, scrap, and liver oil; bonito oil; pollock liver oil; Pacific whiting, body and organ oil; mackeral oil; jack mackeral oil; capelin oil; Atlantic salmon, head oil and scrap oil; pink, chum, coho, sockeye, chinook salmon head oil and scrap oil; anchovy oil; anchoveta oil; sardine oil; chub oil; sablefish body, scrap, and organ oil; trout waste and organ oil; herring oil; thread herring oil; dogfish and other shark liver oil; sturgeon oil; eel oil; pilchard oil; shad oil; alewife oil; smelt oil; rockfish oil; cod, scrap or liver oil; halibut liver oil; swordfish liver oil; pomfret oil; atka mackerel (greenlings) oil; sole, body and liver oil; and flounder, body and liver oil.
Claim 5
Dependent Claim
133 words
A process according to claim 2, wherein the fish oil is menhaden oil; albacore, skipjack, yellowfin, bluefin, and other tuna cooker, scrap, and liver oil; bonito oil; pollock liver oil; Pacific whiting, body and organ oil; mackerel oil; jack mackeral oil; capelin oil; Atlantic salmon, head oil and scrap oil; pink, chum, coho, sockeye, chinook salmon head oil and scrap oil; anchovy oil; anchoveta oil; sardine oil; chub oil; sablefish body, scrap, and organ oil; trout waste and organ oil; herring oil; thread herring oil; dogfish and other shark liver oil; sturgeon oil; eel oil; pilchard oil; shad oil; alewife oil; smelt oil; rockfish oil; cod, scrap or liver oil; halibut liver oil; swordfish liver oil; pomfret oil; atka mackeral (greenlings) oil; sole, body and liver oil; and flounder, body and liver oil.
References Cited (Backward Citations)
US4554107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |