Bobby Avery Howell

US Patent:

50452592, Sep 3, 1991

Filed:

Mar 14, 1990

Appl. No.:

7/493100

Inventors:

Jack A. Berdasco - Midland MI
Stephen R. Betso - Midland MI
Kun S. Hyun - Midland MI
Bobby A. Howell - Mount Pleasant MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B29C 4778

US Classification:

264 85

Abstract:

The present invention is a process for forming an extruded article containing a copolymer of vinylidene chloride and at least one other ethylenically-unsaturated comonomer, said process comprising the step of extruding the copolymer in the presence of (1) at least one gas which is inert with respect to the copolymer and does not plasticize the copolymer; and (2) essentially no gases which are not inert with respect to the copolymer. Vinylidene chloride copolymers extruded according to the process of the present invention have lower metal adhesion and less tendency to contain specks of carbon than do vinylidene chloride copolymer copolymers extruded under an air atmosphere.

US Patent:

20200262974, Aug 20, 2020

Filed:

May 6, 2020

Appl. No.:

16/868339

Inventors:

- Mt. Pleasant MI, US
Bobby A. Howell - Mt. Pleasant MI, US
Cuiwei Zhang - Midland MI, US

International Classification:

C08G 63/91
A61K 47/34
A61K 31/198
A01N 37/10
A01N 35/02
A01N 31/14
A61K 9/00
A01N 25/10
A61K 31/573
A61K 31/192
C08L 101/16
C08L 101/00
A01N 25/18
C08G 63/12
A61K 31/60
A61K 31/165
A61K 9/70

Abstract:

The present invention provides a sustained release composition having hyperbranched polymers that are polyesters that are biobased and biodegradable, and that have at least one active ingredient, which composition delivers the active ingredient over time. These active ingredients can be a wide variety of compounds so long as they can covalently bind to the polymer or be encapsulated in the polymer in a manner that is released at the point of delivery, usually by acid hydrolysis or enzymatic bond scission.