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Leos J Zeman

from Woburn, MA
Age ~82
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Also known as:
Sandra Niemszyk, Henry Kreide
Phone and address:
201 Bedford St, Woburn, MA 01801
(781) 938-8347
Related to:
Benjamin C Parker, 48Charles Moore Parker, 72Charles M Parker, 48Sandra Niemszyk, 74Debra A Freire, 60Kristen Felton, 51Henry Kreide, 94Vuth Ith, 65
Connected to:
Bernard J Zeman, 102Colleen Zeman, 76Dale E Zeman, 67Ellen C Zeman, 66Frederick T Zeman, 74Gabriel Zeman, 54Helenka M Zeman, 61Jamie L Zeman, 49Lukas F Zeman, 42Melissa L Zeman, 49

Leos Zeman Phones & Addresses

  • 201 Bedford St, Woburn, MA 01801 (781) 938-8347
  • 39 Hammond Pl, Woburn, MA 01801 (781) 938-8347
  • 201 Hammond Pl, Woburn, MA 01801
  • 201 Bedford Rd, Woburn, MA 01801 (781) 938-8347
  • Lexington, MA

Work

Position: Professional/Technical

Education

Degree: Graduate or professional degree

Publications

Isbn (Books And Publications)

Microfiltration and Ultrafiltration: Principles and Applications

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Author

Leos J. Zeman

ISBN #

0824797353

Us Patents

Microporous Polymeric Membrane

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US Patent:
43023347, Nov 24, 1981
Filed:
Sep 21, 1979
Appl. No.:
6/077592
Inventors:
Stephen Z. Jakabhazy - Weston MA
Leos J. Zeman - Winchester MA
Assignee:
Abcor, Inc. - Wilmington MA
International Classification:
B01D 3100
US Classification:
2105002
Abstract:
A microporous polymeric membrane is made by preparing a polymer-casting solution, casting a thin film of the casting solution on a support base, allowing partial evaporation of the solvent from the cast film for a predetermined period of time and contacting the partially evaporated film with a leaching liquid to provide the microporous membrane. A membrane with particularly good mechanical strength and hydrophilic properties is formed when the casting solution comprises a vinylidene fluoride polymer and from about 35 to about 85% by weight of a vinyl acetate polymer; and when the acetate polymer is hydrolyzed after the leaching step to convert the acetate groups to hydroxyl groups.

Process For Preparing A Membrane

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US Patent:
42489130, Feb 3, 1981
Filed:
May 24, 1979
Appl. No.:
6/042039
Inventors:
Stephen Z. Jakabhazy - Weston MA
Leos J. Zeman - Winchester MA
Assignee:
Abcor, Inc. - Wilmington MA
International Classification:
B05D 500
B01D 1300
US Classification:
427244
Abstract:
A process for preparing a microporous polymeric membrane, which process comprises preparing a polymer-casting solution, casting a thin film of the casting solution on a support base, allowing partial evaporation of the solvent from the cast film for a predetermined period of time and contacting the partially evaporated cast film with the microporous leaching liquid to provide a membrane, the improvement which comprises: providing a casting solution which comprises a vinylidene fluoride polymer and from about 35 to about 85% by weight of a vinyl acetate polymer; and hydrolyzing the acetate polymer after the leaching step to convert the acetate groups to hydroxyl groups, to provide an improved membrane having good mechanical strength and hydrophilic properties.
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Leos J Zeman from Woburn, MA, age ~82 Get Report