Patent ID: 11932726
Assignee: NEKTAR THERAPEUTICS
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 62:
63. The method of claim 62, further comprising detecting water-soluble fulvene polymer in the recovered water-soluble 9-methyl N-hydroxysuccinimidyl carbonate fluorene polymer, wherein the purifying step (iv) comprises dissolving the recovered water-soluble 9-methyl N-hydroxysuccinimidyl carbonate fluorene polymer in a solvent to provide a solution, passing the solution through a thiol-containing resin to remove any water-soluble fulvene polymer to thereby provide a purified solution, and removing solvent from the purified solution to recover purified water soluble 9-methyl N-hydroxysuccinimidyl carbonate fluorene polymer.