JAMES S JOHNSON
Broker in Acton, MA

6465050, Oct 15, 2002

Dec 1, 2000

09/727629

Michael J. Witham - Grafton MA
James S. Johnson - Acton MA

Osmonics, Inc. - Westborough MA

C08J 718

427491, 427488

A non-cracking hydrophilic polyether sulfone membrane is prepared by (a) directly coating the entire surface of a hydrophobic polyethersulfone membrane with an aqueous solution of a polyalkylene oxide polymer and at least one polyfunctional monomer, and (b) polymerizing the monomer over the entire surface of the membrane under conditions which cause the resulting polymer to attach to the polyethersulfone membrane and the polyethylene oxide to form a non-extractable surface which does not crack when the membrane is folded to form a pleated cartridge.

5693231, Dec 2, 1997

May 8, 1995

8/436631

James S. Johnson - Acton MA
Michael J. Witham - Westborough MA
Edward T. Carter - Worcester MA

Micron Separations, Inc. - Westborough MA

B01D 6100, B01D 3900

210651

Polyamide (nylon) microporous membranes are prepared from a polyamide (nylon) polymer which contains aromatic rings, aliphatic carbon chains, and amide groups. The membranes exhibit improved long term performance characteristics. The membranes are preferably prepared from a polyamide polymer having the structure: ##STR1##.

6056903, May 2, 2000

Feb 8, 1999

9/246242

John M. Greenwood - Newton MA
James S. Johnson - Acton MA
Michael J. Witham - Grafton MA

Osmonics, Inc. - Minnetonka MN

B01D 6902

264 41

A method for making a skinless essentially symmetrical hydrophobic polysulfone microporous membrane by the steps of (a) forming a casting solution containing (i) a dissolved polyethersulfone polymer, (ii) a solvent for the polyethersulfone polymer, and (iii) a lower aliphatic glycol; (b) coating a substrate with the casting composition; (c) exposing the coated substrate to atmospheric conditions; (d) passing the exposed coated substrate into a precipitation bath to precipitate the membrane, the precipitation bath containing a lower aliphatic glycol and water; (e) rinsing the membrane; and (f) drying the membrane.

6193077, Feb 27, 2001

Feb 8, 1999

9/246400

Michael J. Witham - Grafton MA
James S. Johnson - Acton MA

Osmonics, Inc. - Westborough MA

B01D 7126

210490

A non-cracking hydrophilic polyether sulfone membrane is prepared by (a) directly coating the entire surface of a hydrophobic polyethersulfone membrane with an aqueous solution of a polyalkylene oxide polymer and at least one polyfunctional monomer, and (b) polymerizing the monomer over the entire surface of the membrane under conditions which cause the resulting polymer to attach to the polyethersulfone membrane and the polyethylene oxide to form a non-extractable surface which does not crack when the membrane is folded to form a pleated cartridge.

5411663, May 2, 1995

Mar 17, 1993

8/032792

James S. Johnson - Acton MA

Micron Separations, Inc. - Westborough MA

B01D 7156

21050038

Alcohol-insoluble polyamide (nylon) microporous separation membranes are prepared from alcohol-soluble polyamide (nylon) polymers. The membranes are hydrophilic and contain crosslinked amide groups of the structure: ##STR1## wherein d is an integer of about 1 to 3.

4894157, Jan 16, 1990

Oct 5, 1987

7/103960

James S. Johnson - Acton MA

Micron Separations, Inc. - Westborough MA

B01D 3100

210490

A continuous process for producing a microporous cellulosic membranes supported with an integral non-woven polymer web by preparing a casting lacquer comprising at least one cellulosic polymer, at least one solvent and at least one non-solvent wherein the casting lacquer is at the point of incipient gelation.

5215662, Jun 1, 1993

Sep 17, 1990

7/583387

James S. Johnson - Acton MA
Edward T. Carter - Worcester MA

Micron Separations Inc. - Westborough MA

B01D 7156

21050038

Microporous nylon materials which retain near constant time to hydrosaturation during and after heating to temperatures necessary for sealing together a plurality of surfaces, and the synthesis thereof. Nylon 46 dissolved into a mixture of liquid nylon 46 solvents and nonsolvents is dispersed on a fabric substrate, then precipitated to form a laminate, from which a wash removes the nonsolvents and forms the microporous material.

5695639, Dec 9, 1997

Jan 30, 1996

8/593948

James S. Johnson - Acton MA

Micron Separations, Inc. - Westborough MA

B01D 29085

210474

A greatly simplified improved vacuum filter funnel consists of two pieces, namely an upper reservoir member and a lower spout member. The upper reservoir member has an annular ring downwardly extending from the bottom thereof which fits inside an annular rim upwardly extending from the top of the lower spout member. A filter disk rests on an integral grid at the top of the lower spout member and is held in place between the upper and lower members by solely the weight of the upper member. The filter disk is readily removed after simply lifting up the upper reservoir member. Both the reservoir and spout members are preferably constructed of a chemical and heat resistant organic plastic, for example polysulfone, so that the parts may be sterilized in an autoclave.

5390302, Feb 14, 1995

May 13, 1993

8/061754

James E. Johnson - Acton MA
Mark A. Howell - Linlithgou, GB
Christopher Whitaker - Basingstore, GB

Digital Equipment Corporation - Maynard MA

G06F 1500

395325

A transaction management protocol for a multi-processor computer system in which the processors are organized in multi-level hierarchy for implementing the transaction, the protocol being a modification and elaboration of the Presumed Abort (PA) protocol. A coordinating processor is permitted to forget the participation of a subordinate as soon as the protocol has reached the point at which the subordinate's actions on recovery from a crash would be independent of the outcome (commit or abort) of the protocol.