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Patent Assignment Assignee Details

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Assignee Name : RENTECH ENERGY MIDWEST CORPORATION

Total Assignments: 4

Assignment: 1

Reel/Frame:	026427/0307			Pages:	14
		Recorded:	06/10/2011
Attorney Dkt #:	19704-014
Conveyance:	RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).

Assignor

CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH

Exec Dt:

06/08/2011

Assignees

RENTECH ENERGY MIDWEST CORPORATION

10877 WILSHIRE BOULEVARD

SUITE 600

LOS ANGELES, CALIFORNIA 90024

RENTECH, INC.

10877 WILSHIRE BOULEVARD

SUITE 600

LOS ANGELES, CALIFORNIA 90024

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5324335	NONE		07867456	5504118	NONE		08212735	5645613	NONE		08307014
5621155	NONE		08428793	5506272	NONE		08470495	5543437	NONE		08470496
5500449	NONE		08470497	5620670	NONE		08470498	5763716	NONE		08834837
6068760	NONE		09130457	6306917	NONE		09376709	6380268	NONE		09560248
6534552	US20020032244		09870466	6730221	US20020179506		09871148	6627666	NONE		09924262
6632846	US20020055545		09963349	6809123	US20040029983		10213896	6712982	US20030205516		10417107
6976362	US20040216465		10612573	7108835	US20050080147		10681823	6838487	NONE		10728109
7300642	NONE		11004036	7303731	US20050196332		11005873	7644587	US20080223046		11316455
7544719	US20080015266		11456962	7964156	US20080038159		11874661	7803329	US20080132588		11874741

Correspondence name and address
	PROSKAUER ROSE LLP
	1585 BROADWAY
	17-19
	NEW YORK, NY 10036

Assignment: 2

Reel/Frame:	026428/0416			Pages:	22
		Recorded:	06/10/2011
Attorney Dkt #:	19704-014
Conveyance:	RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).

Assignor

CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH

Exec Dt:

06/08/2011

Assignees

RENTECH ENERGY MIDWEST CORPORATION

10877 WILSHIRE BOULEVARD

SUITE 600

LOS ANGELES, CALIFORNIA 90024

RENTECH, INC.

10877 WILSHIRE BOULEVARD

SUITE 600

LOS ANGELES, CALIFORNIA 90024

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5324335	NONE		07867456	5494653	NONE		08113167	5504118	NONE		08212735
5645613	NONE		08307014	5621155	NONE		08428793	5506272	NONE		08470495
5543437	NONE		08470496	5500449	NONE		08470497	5620670	NONE		08470498
5763716	NONE		08834837	6068760	NONE		09130457	6306917	NONE		09376709
6534552	US20020032244		09870466	6730221	US20020179506		09871148	6627666	NONE		09924262
6632846	US20020055545		09963349	6613111	US20020078867		09990669	6808543	US20020134019		10037980
6680137	US20020194782		10122505	6809123	US20040029983		10213896	6712982	US20030205516		10417107
6976362	US20040216465		10612573	7108835	US20050080147		10681823	6838487	NONE		10728109
7300642	NONE		11004036	7303731	US20050196332		11005873	7644587	US20080223046		11316455
7544719	US20080015266		11456962	7763088	US20080022592		11691105	7964156	US20080038159		11874661
7803329	US20080132588		11874741	7879756	US20090069451		12189424	10086365	US20090062108		12198459
8871096	US20090065437		12206438	9168501	US20090069450		12206538	9018128	US20090075814		12207859
9073025	US20090068073		12207880	8088187	US20090064584		12207978	8105403	US20090090057		12210728
NONE	US20090094141		12210937	8084656	US20090090053		12248333	7915193	US20090111684		12272960
8084508	US20090172996		12351160	7683006	US20090227448		12412779	NONE	US20090280986		12437981
8946114	US20090298681		12474440	NONE	US20090298678		12474552	8778178	US20100113622		12577488
NONE	US20100125107		12616255

Correspondence name and address
	PROSKAUER ROSE LLP
	1585 BROADWAY
	17-19
	NEW YORK, NY 10036

Assignment: 3

Reel/Frame:	026499/0449			Pages:	26
		Recorded:	06/24/2011
Attorney Dkt #:	19704-014
Conveyance:	CORRECTIVE ASSIGNMENT TO CORRECT THE RELEASE BY SECURED PARTY, TO REMOVE RECEIVING PARTY RENTECH, INC. ERRONEOUSLY LISTED ON THE COVER SHEET PREVIOUSLY RECORDED ON REEL 026428 FRAME 0416. ASSIGNOR(S) HEREBY CONFIRMS THE REMOVAL OF RECEIVING PARTY RENTECH, INC.

Assignor

CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH

Exec Dt:

06/08/2011

Assignee

RENTECH ENERGY MIDWEST CORPORATION

10877 WILSHIRE BOULEVARD

SUITE 600

LOS ANGELES, CALIFORNIA 90024

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5324335	NONE		07867456	5494653	NONE		08113167	5504118	NONE		08212735
5645613	NONE		08307014	5621155	NONE		08428793	5506272	NONE		08470495
5543437	NONE		08470496	5500449	NONE		08470497	5620670	NONE		08470498
5763716	NONE		08834837	6068760	NONE		09130457	6306917	NONE		09376709
6534552	US20020032244		09870466	6730221	US20020179506		09871148	6627666	NONE		09924262
6632846	US20020055545		09963349	6613111	US20020078867		09990669	6808543	US20020134019		10037980
6680137	US20020194782		10122505	6809123	US20040029983		10213896	6712982	US20030205516		10417107
6976362	US20040216465		10612573	7108835	US20050080147		10681823	6838487	NONE		10728109
7300642	NONE		11004036	7303731	US20050196332		11005873	7644587	US20080223046		11316455
7544719	US20080015266		11456962	7763088	US20080022592		11691105	7964156	US20080038159		11874661
7803329	US20080132588		11874741	7879756	US20090069451		12189424	10086365	US20090062108		12198459
8871096	US20090065437		12206438	9168501	US20090069450		12206538	9018128	US20090075814		12207859
9073025	US20090068073		12207880	8088187	US20090064584		12207978	8105403	US20090090057		12210728
NONE	US20090094141		12210937	8084656	US20090090053		12248333	7915193	US20090111684		12272960
8084508	US20090172996		12351160	7683006	US20090227448		12412779	NONE	US20090280986		12437981
8946114	US20090298681		12474440	NONE	US20090298678		12474552	8778178	US20100113622		12577488
NONE	US20100125107		12616255

Correspondence name and address
	PROSKAUER ROSE LLP
	1585 BROADWAY
	17-19
	NEW YORK, NY 10036

Assignment: 4

Reel/Frame:	031799/0846			Pages:	21
		Recorded:	12/17/2013
Attorney Dkt #:	011962-0006
Conveyance:	RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).

Assignor

CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH

Exec Dt:

11/09/2011

Assignees

RENTECH, INC.

10877 WILSHIRE BLVD., SUITE 600

LOS ANGELES, CALIFORNIA 90024

RENTECH ENERGY MIDWEST CORPORATION

10877 WILSHIRE BOULEVARD, SUITE 600

LOS ANGELES, CALIFORNIA 90024

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
8146368	US20100109338		12628975	8241523	US20100181539		12691297	8138115	US20100152036		12713358
7968611	US20100152307		12713807	NONE	US20100256246		12754797	7919065	US20100204348		12764373
8168686	US20110168605		12976763	8431081	US20110211996		13104961

Correspondence name and address
	TIMOTHY S. WESTBY
	P.O. BOX 4078
	PORTER HEDGES, LLP
	HOUSTON, TX 77521

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