Linneaus C Dorman

US Patent:

51339200, Jul 28, 1992

Filed:

Mar 25, 1991

Appl. No.:

7/674817

Inventors:

Linneaus C. Dorman - Midland MI
John A. Rice - Midland MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B29C 4314

US Classification:

264241

Abstract:

A family of composite materials consisting of a mineral filler and a synthetic polymer are provided which are characterized by properties similar to natural ivory. The ivory-like composite material contains about 25 to about 75 percent by weight of the mineral filler, preferably a calcium phosphate. In addition, the composite material contains about 75 to about 25 percent by weight of the polyamino acid, preferably an. alpha. -amino acid such as poly(gamma-methyl L-glutamate). The composite material is formed using in situ polymerization techniques, thereby ensuring intimate and homogeneous blending of the mineral and polymer phases as well as facile preparation at ambient temperatures. In addition, the ivory-like composite material is molded using an isostatic compression molding technique. The composite material may be molded to form virtually any desired shape for decorative or practical purposes, or for subsequent carving.

US Patent:

39667014, Jun 29, 1976

Filed:

Nov 7, 1973

Appl. No.:

5/413745

Inventors:

Linneaus C. Dorman - Midland MI
Roberta C. Cheng - Midland MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C07C10352
C08H 100
A61K 3700

US Classification:

2601125R

Abstract:

Fibrinogen peptide derivatives which have biological activity as anticoagulants of blood having the dipeptide moiety prolylarginine or the tripeptide moiety glycylprolylarginine, e. g. , L-prolyl-L-arginine benzyl ester p-toluenesulfonate trifluoroacetate, glycyl-L-prolyl-L-arginine benzyl ester p-toluenesulfonate trifluoroacetate, N-t-butyloxycarbonyl-L-prolyl-L-arginine benzyl ester p-toluenesulfonate methanolate, N-benzyloxycarbonyl-prolyl-L-arginine benzyl ester p-toluenesulfonate methanolate and N-t-butyloxycarbonylglycol-L-prolyl-L-arginine benzyl ester p-toluenesulfonate.

US Patent:

48426040, Jun 27, 1989

Filed:

Jun 1, 1987

Appl. No.:

7/056496

Inventors:

Linneaus C. Dorman - Midland MI
Paul A. Meyers - Dublin CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

A61F 228

US Classification:

623 16

Abstract:

A process for the prosthetic supplementation or replacement of hard tissue. In the process an anatomically-shaped form is molded by or a prosthetic device is coated with a composite material containing unsintered calcium phosphate biomaterial, a synthetic biodegradable polymer, and optionally, a pore-forming agent.

US Patent:

46615369, Apr 28, 1987

Filed:

Oct 2, 1986

Appl. No.:

6/914687

Inventors:

Linneaus C. Dorman - Midland MI
Paul A. Meyers - Dublin CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

A61F 200

US Classification:

523113

Abstract:

An in situ polymerization process is disclosed whereby an. alpha. -amino acid N-carboxyanhydride is blended intimately and efficiently with one or more calcium phosphate biomaterials. The polymerization proceeds at ambient temperature and pressure without the need for initiators or surface modification of the calcium phosphate biomaterials. The resulting composite material may subsequently be ground and blended with a compatible water soluble pore-forming agent and then molded to form dense, shaped objects which may be made porous by leaching out said water soluble pore-forming agent. The resulting shaped objects may then be used as hard tissue prosthetics either alone or in conjunction with conventional prostheses.

US Patent:

45171114, May 14, 1985

Filed:

Jan 16, 1984

Appl. No.:

6/571039

Inventors:

Linneaus C. Dorman - Midland MI
Vernon A. Stenger - Midland MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C09K 300

US Classification:

25218625

Abstract:

A composition of matter comprising a permanganate salt adsorbed or chemisorbed onto a solid alkaline support useful in a method for irreversibly removing or decreasing the amount of formaldehyde in the atmosphere. The composition further provides a color change indication when the formaldehyde absorbing characteristic is exhausted. The composition can be employed in molded, pellet, particle or powder form as, for example, in a respirator filter cartridge.

US Patent:

48288357, May 9, 1989

Filed:

Jun 5, 1986

Appl. No.:

6/871002

Inventors:

Paul A. Meyers - Dublin CA
Linneaus C. Dorman - Midland MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

A01N 2508

US Classification:

424409

Abstract:

A storage stable, water emulsifiable, substantially non-aqueous liquid or low melting solid concentrate adapted for on-site preparation of an aqueous emulsion of an agricultural chemical, consisting essentially of a solution, in (a) a liquid hydrophobic agricultural chemical having biocidal activity, of (b) a solid hydrophobic polymer, in an amount effective to achieve sustained release of (a), and (c) an emulsifying agent, in an amount effective to form a stable oil-in-water emulsion when the concentrate is mixed with water.

US Patent:

46952950, Sep 22, 1987

Filed:

Sep 24, 1986

Appl. No.:

6/911275

Inventors:

Linneaus C. Dorman - Midland MI
Victor E. Meyer - Midland MI
Marinda L. Wu - San Ramon CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01D 5322

US Classification:

55 16

Abstract:

The invention relates to improved gas separation membranes fabricated from cyclic iminoether modified alpha-olefin/carboxylic acid copolymers. The modified membranes possess improved gas selectivities and/or permeabilities over the unmodified membranes. The membranes may be used to separate gas mixtures containing such gases as oxygen, nitrogen, methane, and carbon dioxide.

US Patent:

46084193, Aug 26, 1986

Filed:

Mar 18, 1985

Appl. No.:

6/712820

Inventors:

Linneaus C. Dorman - Midland MI
Victor E. Meyer - Midland MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08F 800

US Classification:

5253299

Abstract:

A modified copolymer composition comprising a polymerizable olefin and an. alpha. ,. beta. -ethylenically unsaturated carboxylic acid wherein at least a portion of the carboxyl groups have been converted to an ester/amide derivative by contact with a cyclic iminoether compound, e. g. 2-ethyl-2-oxazoline. A process for preparing the modified copolymer and a laminate structure where at least one of the plurality of layers is the modified copolymer.