Stephen K Chang

US Patent:

39502660, Apr 13, 1976

Filed:

Nov 28, 1973

Appl. No.:

5/419715

Inventors:

Stephen S. Chang - East Brunswick NJ
Cheng-Li Huang - Piscataway NJ
An-Li Hsieh - New Brunswick NJ

Assignee:

Rutgers Research and Educational Foundation - New Brunswick NJ

International Classification:

C09K 1534
A23B 400
A23L 128

US Classification:

252398

Abstract:

Antioxidant compositions, useful for preventing deterioration of oils and fats in food products, are prepared by a two-stage extraction from rosemary or sage. A crude product is first extracted from the plant material with a low-boiling solvent separable by evaporation, and is then found to be separable from contaminants that cause objectionable taste or odor, by vacuum steam or molecular distillation, with the antioxidant in a suitable oil carrier, and with the contaminants removed in vapor state. A special purification of the extract, for a product of very high purity except for some flavor or odor for which distillation may be needed, is attainable by chromatography, wherein the antioxidant material favors solvents of greater polarity than solvents in which other materials are eluted. The new antioxidant compositions are not only widely useful but appear to have unusual value in respect to vegetable oils and in respect to oils used in deep frying, and also are found of special value for inhibiting certain flavor and odor effects that occur in soybean oil.

US Patent:

50770691, Dec 31, 1991

Filed:

Jan 7, 1991

Appl. No.:

7/638063

Inventors:

Stephen S. Chang - East Brunswick NJ
Kejian Wu - St. Paul MN

Assignee:

Kabi Pharmacia AB - Stockholm

International Classification:

A23B 414
A23B 508
A23B 916
A23D 706

US Classification:

4263306

Abstract:

The present invention provides for a composition of natural antioudants comprising tocopherol, ascorbic acid, citric acid and phospholepeds which are useful in oxidation of oils.

US Patent:

46702679, Jun 2, 1987

Filed:

Apr 18, 1985

Appl. No.:

6/724846

Inventors:

Stephen S. Chang - East Brunswick NJ
Chi-Tang Ho - East Brunswick NJ
Barbara A. Izzo - Bridgwater NJ

Assignee:

Lever Brothers Company - New York NY

International Classification:

A23C 2102
A23L 122

US Classification:

426 41

Abstract:

A butter flavoring composition is prepared by fermenting a sweet-whey medium. The sweet-whey medium comprises water, sweet-whey solids, a biosynthesis-precursor-compound fortifier, and a fatty-compound enriching agent. The sweet-whey medium is pasteurized and then innoculated with a microorganism culture comprising the microorganism Leuconostoc cremoris. The innoculated medium is then incubated in a controlled temperature range with agitation and aeration to produce a fermented composition suitable for use as a butter flavoring.

US Patent:

41016734, Jul 18, 1978

Filed:

Dec 13, 1976

Appl. No.:

5/745069

Inventors:

Stephen S. Chang - East Brunswick NJ

Assignee:

Vitrum AB - Stockholm

International Classification:

A01N 924

US Classification:

424312

Abstract:

Parenterally administrable oil-in-water emulsions formed from nutritive oils, such as soybean and sunflower oils, are improved first by treating the nutritive oil with silicic acid to remove undesirable components such as peroxides, pigments, thermal and oxidative decomposition products, certain unsaponifiable matter such as sterols, and polymers. Purification is effected by treating the oil with silicic acid or silica gel either directly, or as a solution thereof in a suitable solvent, such as hexane. Autoxidation of the purified oil is prevented by adding to the purified oil a tocopherol antioxidant,. gamma. -tocopherol being preferred. There is also added a metal scavenging agent such as ascorbyl palmitate.

US Patent:

50231006, Jun 11, 1991

Filed:

Oct 2, 1989

Appl. No.:

7/415765

Inventors:

Stephen S. Chang - East Brunswick NJ
Yongde Bao - East Brunswick NJ
Timothy J. Pelura - Alameda CA

Assignee:

Kabi Vitrum AB

International Classification:

A23D 500
C11B 312

US Classification:

426601

Abstract:

An edible fish oil is disclosed which contains EPA and DHA. This oil, with significantly reduced undesirable impurities, is obtained by subjecting fish oil to vacuum steam distillation contacting the oil with an adsorbent and recovering the oil. The oil can be combined with a vegetable oil and/or Rosemary extract antioxidant to improve its oxidative stability.

US Patent:

48746290, Oct 17, 1989

Filed:

May 2, 1988

Appl. No.:

7/189198

Inventors:

Stephen S. Chang - East Brunswick NJ
Yongde Bao - New Brunswick NJ
Timothy J. Pelura - Alameda CA

International Classification:

A23D 500
C11B 312

US Classification:

426601

Abstract:

A process of treating oils containing Omega-3 fatty acids, such as fish oils like Menhaden oil, sardine oil, salmon oil and other oils, to produce odorless and flavorless oils which contain only insignificant amounts of undesirable minor constituents, such as thermal and oxidative polymers of unsaturated glycerides, trans-isomers, positional isomers, conjugated dienes and trienes, cholesterols, pesticides, PCBs and heavy metals, and which have reasonably good flavor and oxidative stabilities.

US Patent:

52309169, Jul 27, 1993

Filed:

Dec 23, 1991

Appl. No.:

7/813160

Inventors:

Stephen S. Chang - East Brunswick NJ
Kejian J. Wu - Clarendon Hills IL

Assignee:

Kabi Pharmacia AB - Uppsala

International Classification:

A23B 414
A23B 508

US Classification:

4263306

Abstract:

A natural antioxidant for stabilizing polyunsaturated oils is disclosed. This oil-soluble antioxidant is prepared by dissolving ascorbic acid in a polar solvent, dissolving phospholipid in a non-polar solvent and then mixing the ascorbic acid solution with the phospholipid solution. After removing the solvent a product is formed which has anti-oxidant properties and is soluble in non-polar solvents.

US Patent:

46380957, Jan 20, 1987

Filed:

Aug 10, 1984

Appl. No.:

6/639899

Inventors:

Stephen S. Chang - East Brunswick NJ
Chi-Tang Ho - East Brunswick NJ
Christopher M. Houlihan - Parsippany NJ

Assignee:

Research Corporation - New York NY

International Classification:

C07C 49573

US Classification:

568326

Abstract:

This disclosure describes the extraction of a novel antioxidant, Rosmaridiphenol, isolated from the leaves of Rosemary.