Abstract: An improved prosthetic device with a vacuum system for maintaining a negative pressure seal between the socket and the residual limb. The vacuum system includes a vacuum surge chamber which maintains seal vacuum and increases the time between recharging a Li ion battery, allowing the battery to be recharged-up to 500 times. The system is small, lightweight, and concealable within the prosthetic device so that it neither impedes use of the device nor detracts from a cosmetically accurate limb.

Abstract: An improved prosthetic device with a vacuum system for maintaining a negative pressure seal between the socket and the residual limb. The vacuum system includes a vacuum surge chamber which maintains seal vacuum and increases battery life. The system is small, lightweight, and concealable within the prosthetic device so that it neither impedes use of the device nor detracts from a cosmetically accurate limb.

Abstract: An improved prosthetic device with a vacuum system for maintaining a negative pressure seal between the socket and the residual limb. The vacuum system includes a vacuum surge chamber which maintains seal vacuum and increases the time between recharging a Li ion battery, allowing the battery to be recharged-up to 500 times. The system is small, lightweight, and concealable within the prosthetic device so that it neither impedes use of the device nor detracts from a cosmetically accurate limb.

Abstract: An improved prosthetic device with a vacuum system for maintaining a negative pressure seal between the socket and the residual limb. The vacuum system includes a vacuum surge chamber which maintains seal vacuum and increases battery life. The system is small, lightweight, and concealable within the prosthetic device so that it neither impedes use of the device nor detracts from a cosmetically accurate limb.

Abstract: This invention relates to monoxanthates and dixanthates of dipropylene glycol and triethylene glycol. These xanthates increase both the rate of plant growth and the concentration of chlorophyll in the plants.

Abstract: This invention relates to condensation polymers of thiolactic and thioglycolic acids. These polymers, as well as thiolactic acid, 2,2'-dithobisacetic acid, and 2,2'-dithiobispropanoic acid, increase both the rate of plant growth and the concentration of chlorophyll in the plant.

Abstract: The present invention relates to copolymerizable macromolecular monomers comprised of linear polymers or copolymers having one terminal moiety which contains two functional groups of substantially equivalent reactivity in participating in a condensation copolymerization reaction with difunctional condensible comonomers or prepolymers wherein the macromolecular monomers have substantially the same molecular weight. The present invention also relates to chemically joined, phase separated graft copolymers of the copolymerizable macromolecular monomers with at least two different condensible difunctional comonomers capable of reacting with each other and at least one of which is capable of reacting with the terminal moiety on the macromolecular monomers.

Abstract: The present invention relates to a novel composition of matter comprising: polymerizable "tapered" (or "graded") block macromolecular monomers, each of said polymerizable monomers comprising at least one polymeric segment having at least about 20 uninterrutped recurring monomeric units of at least one anionically polymerized mono-alkenyl-substituted aromatic hydrocarbon and a copolymerized segment of a mono-alkenyl-substituted aromatic hydrocarbon and a conjugated diene; each of said polymerizable monomers terminating with no more than one polymerizable end group containing a moiety selected from the group consisting of vinyl, vinylene, glycol, epoxy, or thioepoxy groups per mole of said polymerizable monomers, said polymerizable monomers denoted as preferably having a substantially uniform molecular weight distribution such that their ratio of Mw/Mn is less than about 1.

Abstract: The present invention relates to copolymerizable macromolecular monomers comprised of linear polymers or copolymers having one terminal moiety which contains two functional groups of substantially equivalent reactivity in participating in a condensation copolymerization reaction with difunctional condensible comonomers or prepolymers wherein the macromolecular monomers have substantially the same molecular weight. The present invention also relates to chemically joined, phase separated graft copolymers of the copolymerizable macromolecular monomers with at least two different condensible difunctional comonomers capable of reacting with each other and at least one of which is capable of reacting with the terminal moiety on the macromolecular monomers.