Syed Fazal Ahmed

US Patent:

47999624, Jan 24, 1989

Filed:

Dec 24, 1987

Appl. No.:

7/137841

Inventors:

Syed M. Ahmed - Wilmington DE

Assignee:

Aqualon Company - Wilmington DE

International Classification:

C08N 108

US Classification:

106188

Abstract:

A particulate water-soluble polymer is dispersed in a liquid medium comprised of low molecular weight polyethylene glycol, water and high molecular weight polyethylene glycol in amounts sufficient to impart stability to the dispersion. The dispersion is used in a process for dispersing the water-soluble polymer into aqueous solutions, such as latex paints, comprising preparing the dispersion and feeding the dispersion into the aqueous solution. The dispersion has excellent dispersion stability and fluidity, and is easier to handle and has a higher dissolution rate than the dry powder (particulate) form of the water-soluble polymer.

US Patent:

51439700, Sep 1, 1992

Filed:

Jun 3, 1991

Appl. No.:

7/709659

Inventors:

Syed M. Ahmed - Hockessin DE

Assignee:

Aqualon Company - Wilmington DE

International Classification:

C08K 549

US Classification:

524710

Abstract:

Water wet nitrocellulose, butyl acrylate/methyl methacrylate monomers and phosphate surfactant are emulsified into an oil-in-water emulsion and polymerized to produce a nitrocellulose/acrylic latex emulsion with a particle size below 0. 25 microns. Wood finishing lacquers produced from this latex emulsion are equivalent in performance to solvent lacquers while lowering VOC to below 2. 3 lb/gal.

US Patent:

49921924, Feb 12, 1991

Filed:

Apr 21, 1989

Appl. No.:

7/341451

Inventors:

Syed M. Ahmed - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C10M16904
C09K 300

US Classification:

252 73

Abstract:

Disclosed are electrorheological (ER) fluids which display improved stability against sedimentation, reduced current density and good ER responses. Thes=e ER fluids are prepared from monomers which are polymerized by dispersion polymerization in a low conductivity medium which also serves as the dispersion medium for the fluid. The ER fluids are further processed by modifying the polymer particles through polymerization of a hydrophilic monomer to form a hydrophilic shell or globule around the particles followed by neutralization through addition of an organic soluble base. The resulting dispersion is then doped with water to obtain a stable ER fluid. The hydrophilic shell or globule constitutes about 15% of the particle. Water dopant is only absorbed by the hydrophilic portion of the particle and does not enter into the core of the particle. The quantity of water is significantly reduced, which in turn results in a significant reduction of the current density at any given comparative voltage.

US Patent:

49902792, Feb 5, 1991

Filed:

Apr 21, 1989

Appl. No.:

7/341450

Inventors:

Syed M. Ahmed - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C10M16904
C09K 300

US Classification:

252 73

Abstract:

Disclosed are electrorheological (ER) fluids which display improved stability against sedimentation, reduced current density and good electrorheological response. These ER fluids are prepared from monomers which are polymerized by dispersion polymerization in a low conductivity medium which in most embodiments of the invention serves as the dispersion medium for the fluid. the ER fluids are further processed by modifying the polymer particles through polymerization of a hydrophilic monomer to form a hydrophilic shell or globule around the particles. The resulting dispersion is then doped with water to obtain a stable ER fluid. The hydrophilic shell or globule constitutes a minor part of the particle. Water dopant is only absorbed by the hydrophilic portion of the particle and does not enter into the core of the particle. The quantity of water is significantly reduced, which in turn results in a significant reduction of the current density at any given applied field strength.

US Patent:

50732820, Dec 17, 1991

Filed:

Apr 21, 1989

Appl. No.:

7/341441

Inventors:

Syed M. Ahmed - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C10M16904
C09K 300

US Classification:

252 77

Abstract:

Disclosed are electrorheological fluids which display improved stability against sedimentation, reduced current density and good electrorheological responses. In the preferred embodiment of this invention, these electrorheological fluids are prepared from monomers which are polymerized by dispersion polymerization in a low conductivity medium which also serves as the dispersion medium for the fluid.

US Patent:

54534216, Sep 26, 1995

Filed:

Aug 12, 1993

Appl. No.:

8/103053

Inventors:

Karnail S. Atwal - Newtown PA
Syed Z. Ahmed - Pennington NJ
Dinos P. Santafianos - Maplewood NJ

Assignee:

E. R. Squibb & Sons, Inc. - Princeton NJ

International Classification:

A61K 3135
A61K 31665
C07D31168
C07F 9655

US Classification:

514100

Abstract:

Novel compounds useful, for example, for the treatment of ischemic conditions and arrhythmia are disclosed. The compounds have the formula ##STR1## wherein X is oxygen or sulfur and the R groups are as defined herein.

US Patent:

20180236714, Aug 23, 2018

Filed:

Aug 25, 2016

Appl. No.:

15/752984

Inventors:

- Bergen op Zoom, NL
Tariq SYED - Riyadh, SA
Syed Mahmood AHMED - Hockessin DE, US
Abdullah Shamroukh OTAIBI-AL - Riyadh, SA

International Classification:

B29C 64/371
B29C 64/135
B29C 64/153
B22F 3/105
B29C 64/295
B29C 71/04

Abstract:

The disclosure describes systems and methods for performing additive manufacturing. The method includes forming a first layer of a product on a target surface, heating a portion of the first layer with a directed energy source, and forming a second layer of the product on the first layer. The system for performing additive manufacturing includes a vacuum chamber, a target surface disposed in the vacuum chamber, a first layer of material formed on the target surface, a directed energy source configured to heat a portion of the first layer, and a second layer of material formed on the heated portion of the first layer.