IP Library › Granted Patent US 7,868,168
Granted Patent B2
US 7,868,168 · App. 12/211,170 · Granted Jan 11, 2011

High viscosity xanthan polymer preparations

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Quick Facts
Patent No.
US 7,868,168
App. No.
12/211,170
Granted
Jan 11, 2011
Kind
B2
Abstract

Increasing the molecular length of xanthan polymer makes a higher viscosity xanthan composition. Xanthan with higher specific viscosity characteristics provides more viscosity at equivalent concentration in food, industrial and oilfield applications. Methods for increasing the viscosity of xanthan include inducing particular key genes and increasing copy number of particular key genes.

Claims (7)

1. An unpasteurized xanthan composition from a recombinant Xanthomonas campestris culture having multiple copies of gumB and gumC, wherein said composition has an intrinsic viscosity which is at least 20% greater than xanthan from a corresponding strain of Xanthomonas campestris not having multiple copies of gumB and gumC.

2. The unpasteurized xanthan composition of claim 1 which has an intrinsic viscosity which is at least 25% greater than xanthan from the corresponding strain.

3. The unpasteurized xanthan composition of claim 1 which has an intrinsic viscosity which is at least 30% greater than xanthan from the corresponding strain.

4. A xanthan composition from a recombinant Xanthomonas campestris culture having multiple copies of gumB and gumC, comprising a population of xanthan molecules having a range of molecular lengths, wherein at least 1% of the population has a length of at least 3 μm as measured by atomic force microscopy.

5. An unpasteurized xanthan composition from a recombinant Xanthomonas campestris culture having multiple copies of gumB and gumC, wherein said composition has a seawater viscosity which is at least 10% greater than xanthan from a corresponding strain of Xanthomonas campestris not having multiple copies of gumB and gumC.

6. The xanthan composition of claim 5 which has a seawater viscosity of DR>25 when the seawater viscosity is measured in a solution of 41.95 g of sea salt per 1 liter deionized water and at a concentration of 0.86 g xanthan per liter.

7. The xanthan composition of claim 5 which has a seawater viscosity which is at least 15% greater than xanthan from the corresponding strain.

Assignments (4)
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Jun 27, 2014
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: J.M. HUBER CORPORATION; CP KELCO U.S., INC.; HUBER ENGINEERED WOODS LLC
Reel/Frame 033247/0705 →
SECURITY INTEREST Recorded Nov 8, 2011
From: J.M. HUBER CORPORATION; CP KELCO U.S., INC.; HUBER ENGINEERED WOODS LLC
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS AGENT
Reel/Frame 027279/0114 →
RELEASE OF SECURITY INTEREST Recorded Nov 1, 2011
From: BANK OF AMERICA, N.A.
To: J.M. HUBER CORPORATION; 333 ASSOCIATES LLC; 333 PARTNERS LLC; CELTEGAN LLC; CP KELCO U.S., INC.; HUBER CST COMPANY; HUBER CST CORPORATION; HUBER ENERGY L.P.; HUBER ENERGY LLC; HUBER ENGINEERED WOODS LLC; HUBER EQUITY CORPORATION; HUBER INTERNATIONAL CORP.; HUBER RESOURCES CORP.; HUBER SOUTH TEXAS GP, LLC; HUBER SOUTH TEXAS LP, LLC; HUBER TIMBER INVESTMENTS LLC; HUBER TIMBER LLC; J.M. HUBER MICROPOWDERS INC.; JMH PARTNERS CORP.; KELCO COMPANY; ST. PAMPHILE TIMBER LLC; TABSUM, INC.; TARA INSURANCE GLOBAL LIMITED; QUINCY WAREHOUSES, INC. (FORMERLY UNDERGROUND WAREHOUSES, INC.
Reel/Frame 027158/0142 →
SECURITY AGREEMENT Recorded Mar 29, 2011
From: J.M. HUBER CORPORATION; 333 ASSOCIATES LLC; 333 PARTNERS LLC; CELTEGAN LLC; CP KELCO U.S., INC.; HUBER CST COMPANY; HUBER CST CORPORATION; HUBER ENERGY L.P.; HUBER ENERGY LLC; HUBER ENGINEERED WOODS LLC; HUBER EQUITY CORPORATION; HUBER INTERNATIONAL CORP.; HUBER RESOURCES CORP.; HUBER SOUTH TEXAS GP, LLC; HUBER SOUTH TEXAS LP, LLC; HUBER TIMBER INVESTMENTS LLC; HUBER TIMBER LLC; J.M. HUBER MICROPOWDERS INC.; JMH PARTNERS CORP.; KELCO COMPANY; ST. PAMPHILE TIMBER LLC; TABSUM, INC.; TARA INSURANCE GLOBAL LIMITED; UNDERGROUND WAREHOUSES, INC.
To: BANK OF AMERICA, N.A.
Reel/Frame 026042/0063 →