Agricultural carrier

• US 5,843,203 A
• Filed: 03/22/1996
• Issued: 12/01/1998
• Est. Priority Date: 03/22/1996
• Status: Expired due to Fees

• Current Assignee: Thermo Fibergen, Inc. (Kadant Incorporated)
• Original Assignee: Grantek Incorporated
• Inventors: Lindsay, A. David, Omilinsky, Barry A.
• Primary Examiner(s): Silbaugh, Jan H.
• Assistant Examiner(s): JONES, KENNETH MITCHELL
• Application Number:
  US08/620,937
• Time in Patent Office: 984 Days
• Field of Search: 264/117, 71/11, 71/23, 71/904, 71/DIG. 1
• US Class Current: 71/23
• CPC Class Codes: A01M 1/20 Poisoning, narcotising, or burning insects fumigation apparatus A01M13/00
• CPC Class Codes: A01N 25/12 Powders or granules A01N25/26 takes precedence
• CPC Class Codes: Y10S 71/904 Carrier

Abstract

An improved agricultural carrier and a method of making the carrier is disclosed. The granular carrier is adapted for carrying a low-melting chemical, specifically pesticides. An aromatic solvent is used to dissolve the low-melting chemical, before combining it with the carrier. The granular carrier unexpectedly exceeds its liquid holding capacity for the low-melting chemical.

Claims

1. An improved agricultural carrier comprising:

a granular carrier adapted for carrying a low-melting chemical with a melting point between about 30°

C. and about 60°

C. while remaining free-flowing, the carrier comprising 10-100% plant fibers and 0-90% of a mineral filler; and

the low-melting chemical, combined with an aromatic solvent, present in the granular carrier in an amount exceeding the appairent liquid holding capacity of the carrier,

wherein the ratio of the low-melting chemical to the solvent is between about 62;

38 and about 80;

20.

2. The improved agricultural carrier as claimed in claim 1 where the carrier comprises about 30% fibers and about 70% mineral filler.

3. The improved agricultural carrier as claimed in claim 1 wherein the granule is formed by an agglomeration method.

4. The improved agricultural carrier of claim 1 wherein the chemical is selected from the group consisting of chlorpyrifos, trifluralin, pendimethalin, bifenthrin, cypermethrin, and tefluthrin.

5. The improved agricultural carrier of claim 1 wherein the aromatic solvent is selected from the group consisting of Aromatic 150, Chemical Abstract Service (CAS) Registry No. 64742-94-5;

Aromatic 200, naphthalene depleted, CAS Registry No. 64742-94-5;

Aromatic 100, CAS Registry No. 64742-95-6; and

HAN 857, CAS Registry No. 64742-06-9.