The new law firm created by the spin-off of Ropes & Gray's patent prosecution practice is set to open an office in London after launching this August.

The spinoff, which was unveiled by the firm in early March, will see the creation of Haley Guiliano, a boutique firm specialising in patent prosecution and intellectual property (IP).

A group of about 100 lawyers and staff will officially separate from Ropes to join the new firm on 1 August, including name partners Joseph Guiliano – the co-head of Ropes' IP rights management practice in New York – and senior counsel James Haley.

The new operation will then merge with Shvarts & Leiz, a small US firm founded in 2011 by former Ropes lawyers Alexander Shvarts and James Leiz.

Shvarts & Leiz has offices in Wayne, New Jersey, and San Jose, California, the latter of which will be absorbed into Haley Guiliano, which will also have offices in New York and London, according to Guiliano, who has been in London this week scouting for office space.

One patent attorney and one paralegal from Ropes' London office will join the new firm. The firm's London IP transactions team, which is headed up by partner Rohan Massey, is unaffected by the spinoff.

In New York, Haley Guiliano has agreed to lease about 20,000 sq ft of space in downtown Manhattan. Ropes, which is already subleasing space at its New York headquarters to Fenwick & West, will continue to provide office space to Haley Guiliano for a short period of time as the new firm finalises its real estate footprint in the city.

A Ropes spokesman said that after Haley Guiliano's separation later this summer, the firm will have about 100 lawyers working in its IP group, a practice that will now focus on IP litigation, IP transactions and IP rights management work. Patent prosecution is the only section of IP expertise that Ropes will no longer offer clients.

Earlier this year, Ropes cited the changing needs of clients and shifting costs in the IP space as necessitating a restructuring of its IP practice. James Batchelder, an IP litigator and member of Ropes' policy committee, was unable to state whether the firm would be letting go of any lawyers or staff as a result of the reorganisation. "It's certainly our hope that everyone finds a home," he said.