David N Wasserman

US Patent:

43282040, May 4, 1982

Filed:

Mar 2, 1977

Appl. No.:

5/773449

Inventors:

David Wasserman - Springfield NJ
Charles C. Versfelt - Somerville NJ
Dowon Hahn - Flemington NJ
Michael P. Wachter - Bloomsbury NJ

Assignee:

Ethicon, Inc. - Somerville NJ

International Classification:

A01N 2526
A61J 300

US Classification:

424 19

Abstract:

Drugs with active hydrogen containing groups are reacted with. alpha. -polyester homopolymers and copolymers to form compounds which slowly absorb and release the drug when implanted in animal tissue.

US Patent:

40529886, Oct 11, 1977

Filed:

Jan 12, 1976

Appl. No.:

5/648236

Inventors:

Namassivaya Doddi - Somerville NJ
Charles C. Versfelt - Somerville NJ
David Wasserman - Springfield NJ

Assignee:

Ethicon, Inc. - Somerville NJ

International Classification:

A61L 1700

US Classification:

1283355

Abstract:

Synthetic absorbable sutures and other surgical devices are prepared from polymers of p-dioxanone and 1,4-dioxepan-2-one, and alkyl substituted derivatives thereof. Monofilament sutures of oriented fibers are characterized by good tensile and knot strength and a high level of flexibility and softness. The sutures have good in vivo strength retention and are slowly absorbed without significant tissue reaction.

US Patent:

54603811, Oct 24, 1995

Filed:

Oct 20, 1994

Appl. No.:

8/326211

Inventors:

Raymond W. Smith - New Britain PA
David Wasserman - Horsham PA

International Classification:

A63F 300

US Classification:

273238

Abstract:

A game apparatus wherein players move along a playing path and make various electrical interconnections along the way. At any one given time only one space on the playing field contains an open switch coupled to a noise generating device. If a player lands on the selected space and closes the switch, a noise will sound and the player gets to keep toy money laid out on the playing field. A selection control unit randomly changes the position of the open switch on the game board each time it is found. As a result, a player never knows whether or not he or she is moving toward or away from the open switch. The selection control unit also eliminates previously used spaces from the random selection process. As such, the players know that once a space has been used and the money for that space has been taken, that space will not be selected again.

US Patent:

41574370, Jun 5, 1979

Filed:

Jun 12, 1978

Appl. No.:

5/914692

Inventors:

Yuzi Okuzumi - Belle Mead NJ
A. Darline Mellon - Bridgewater NJ
David Wasserman - Springfield NJ

Assignee:

Ethicon, Inc. - Somerville NJ

International Classification:

C08G 6308

US Classification:

528354

Abstract:

Relatively high molecular weight, fiber-forming, crystalline copolymers of lactide and glycolide are prepared in a two-stage polymerization process. In the first stage there is prepared a random copolymer of a major proportion of an optically active lactide with a minor proportion of glycolide or d,l-lactide. In the second stage, a major amount of glycolide and a minor amount of lactide monomers are admixed with the copolymer of the first stage and the polymerization resumed until there is obtained a high molecular weight addition copolymer of lactide and glycolide containing from about 50 to 75 wt percent of units derived from glycolide. The polymer is fiber-forming and useful in the preparation of absorbable surgical sutures.

US Patent:

41379217, Feb 6, 1979

Filed:

Jun 24, 1977

Appl. No.:

5/809737

Inventors:

Yuzi Okuzumi - Belle Mead NJ
A. Darline Mellon - Bridgewater NJ
David Wasserman - Springfield NJ

Assignee:

Ethicon, Inc. - Somerville NJ

International Classification:

A61L 1700
A61F 124

US Classification:

1283355

Abstract:

Relatively high molecular weight, fiber-forming, crystalline copolymers of lactide and glycolide are prepared in a two-stage polymerization process. In the first stage there is prepared a random copolymer of a major proportion of an optically active lactide with a minor proportion of glycolide or d,l-lactide. In the second stage, a major amount of glycolide and a minor amount of lactide monomers are admixed with the copolymer of the first stage and the polymerization resumed until there is obtained a high molecular weight addition copolymer of lactide and glycolide containing from about 50 to 75 wt percent of units derived from glycolide. The polymer is fiber-forming and useful in the preparation of absorbable surgical sutures.

US Patent:

52645401, Nov 23, 1993

Filed:

Jul 20, 1992

Appl. No.:

7/916919

Inventors:

Kevin Cooper - Bridgewater NJ
David Wasserman - Springfield NJ
Angelo G. Scopelianos - Whitehouse Station NJ
Dennis D. Jamiolkowski - Long Valley NJ

Assignee:

Ethicon, Inc. - Somerville NJ

International Classification:

C08G 6300
C08G 6302
C08G 6700
C08G 6900

US Classification:

528272

Abstract:

An improved process for preparing an aromatic polyanhydride is disclosed. The aromatic polyanhydride is prepared by reacting an aromatic dicarboxylic acid with an anhydride to form an anhydride prepolymer, isolating and purifying the prepolymer, and subjecting the prepolymer to melt polycondensation conditions. The improvement specifically relates to the purification of the acid so it is essentially free of impurities before it is reacted with the anhydride. The polymers prepared from the improved process have higher molecular weights than the molecular weights achieved from the prior art processes, and exhibit outstanding thermal stability and mechanical properties. This combination of properties allows the aromatic polyanhydrides to be melt processed to prepare numerous devices. In addition, these aromatic polyanhydrides are bioabsorbable, and this attribute in combination with its ability for melt processing makes the polyanhydrides particularly well-suited for the preparation of implantable surgical devices such as wound closure devices which are designed to absorb in the body when exposed to moist bodily tissue.

US Patent:

51711486, Dec 15, 1992

Filed:

Jun 30, 1989

Appl. No.:

7/374676

Inventors:

David Wasserman - Springfield NJ
Shalaby W. Shalaby - Lebanon NJ
Otis J. Bouwsma - East Brunswick NJ

Assignee:

Ethicon, Inc. - Somerville NJ

International Classification:

A61C 500

US Classification:

433215

Abstract:

An absorbable mesh material useful as a dental implant. The mesh is cut by lasers to afford smooth edges which will not unravel. The implant may be attached by a ligature or suture material, generally formed from the same material as the implant, and attached to the implant by, among other things, laser or ultrasonic welding or interweaving.