Richard W Rees

US Patent:

43830633, May 10, 1983

Filed:

Apr 9, 1981

Appl. No.:

6/252372

Inventors:

Richard W. Rees - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08K 519

US Classification:

524 91

Abstract:

Polyvinyl alcohol based sizing solution containing a small amount of quaternary (e. g. , dialkyldimethyl) ammonium salt or quaternary imidazolinium salt additives provide good operability during application and weaving and results in fabric having improved finishing performance.

US Patent:

42514037, Feb 17, 1981

Filed:

Dec 5, 1979

Appl. No.:

6/100351

Inventors:

Richard W. Rees - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08L 500

US Classification:

260 174SG

Abstract:

An improved warp size for filament yarn is provided consisting essentially of polyvinyl alcohol, urea, and mono- and di-saccharides, such as sucrose, which when applied to filament yarn from aqueous solution provides excellent abrasion resistance, low shedding, freedom from skinning, and outstanding ease of removal.

US Patent:

40899462, May 16, 1978

Filed:

Jun 7, 1976

Appl. No.:

5/693679

Inventors:

Theodore J. Foell - King of Prussia PA
Richard W. Rees - Bryn Mawr PA

Assignee:

American Home Products Corporation - New York NY

International Classification:

C07C10352
A61K 3700

US Classification:

424177

Abstract:

Compounds of the formula: L-p-Glu-L-His-L-Trp-L-Ser-L-Tyr-X-Y-L-Arg-L-Pro-NHC. sub. 2 H. sub. 5 in which X is D-Trp or D-2-(1,4-cyclohexadienyl)Gly Y is L-(N-methyl)-Leu or L-(N-methyl)-ILe or a non-toxic acid addition salt thereof, are potent ovulation inducers and claudogenic-interceptive agents useful in preventing or terminating pregnancy in mammals.

US Patent:

44839383, Nov 20, 1984

Filed:

Dec 30, 1981

Appl. No.:

6/335632

Inventors:

Richard W. Rees - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F 464

US Classification:

502113

Abstract:

A solution process for the preparation of high molecular weight homopolymers of ethylene and copolymers of ethylene and C. sub. 3 -C. sub. 12. alpha. -olefins is disclosed. The process involves feeding monomer, a particlar coordination catalyst and hydrocarbon solvent to a reactor, polymerizing the monomer at a temperature of 100. degree. -320. degree. C. and recovering the polymer. The catalyst is obtained by either (i) combining solutions of titanium tetrahalide/vanadium oxytrihalide and of organoaluminum compound at a temperature of less than 30. degree. C. , heating the resulting admixture to a temperature of 150. degree. -300. degree. C. for a period of 5 seconds to 60 minutes and combining the thus heat-treated mixture with a solution of an organoaluminum compound or (ii) combining solutions of titanium tetrahalide and of organoaluminum compound at a temperature of less than 30. degree. C. , heating the resultant admixture to a temperature of 150. degree. -300. degree. C. for a period of 5 seconds to 60 minutes, combining the thus heat-treated mixture with vanadium oxytrihalide and then combining the mixture so obtained with a solution of an organoaluminum compound.

US Patent:

42229227, Sep 16, 1980

Filed:

Dec 27, 1978

Appl. No.:

5/973624

Inventors:

Richard W. Rees - Wilmington DE

Assignee:

E. I. Du Pont De Nemours and Company - Wilmington DE

International Classification:

C08L 2904

US Classification:

260 296BE

Abstract:

An improved warp size for filament yarn is provided consisting essentially of polyvinyl alcohol, alkyl phenoxy (or cresoxy) ethoxyethyl dimethylbenzyl ammonium chloride and a plasticizer such as glycerol or urea, which when applied to filament yarn from aqueous solution provides excellent weaving efficiency and ease of removal combined with low shedding in the loom.

US Patent:

39403939, Feb 24, 1976

Filed:

Jun 21, 1974

Appl. No.:

5/481612

Inventors:

George Greenspan - Narberth PA
Richard W. Rees - Bryn Mawr PA
Peter B. Russell - Villanova PA

Assignee:

American Home Products Corporation - New York NY

International Classification:

C07D23934
C07D23942

US Classification:

2602564N

Abstract:

New, substituted, 2,6-diaminopyrimidines are disclosed. These compounds are useful as anti-malarial agents. The oxygenation of pyrimethamine by fungi is also disclosed.

US Patent:

41707095, Oct 9, 1979

Filed:

Oct 3, 1977

Appl. No.:

5/838614

Inventors:

Wenling Kao - King of Prussia PA
Richard W. Rees - Bryn Mawr PA

Assignee:

American Home Products Corporation - New York NY

International Classification:

C07C17700

US Classification:

560121

Abstract:

The preparation of the methyl esters of 16-keto prostaglandin E. sub. 2 and 15-epi-16-keto prostaglandin E. sub. 2 is described. The compounds have hypotensive activity.

US Patent:

39974871, Dec 14, 1976

Filed:

Aug 20, 1974

Appl. No.:

5/498978

Inventors:

Richard Watkin Rees - Wilmington DE
Hans-Georg Reinhardt - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08K 501
C08L 9300

US Classification:

260 27BB

Abstract:

A very useful thermoplastic elastomer can be made by reacting, at an elevated temperature, (A) a suitable alpha-olefin copolymer elastomer (e. g. , a copolymer of ethylene, propylene and a suitable diene) having carboxylic acid groups, and (B) a rosin salt of a divalent or monovalent metal.