ExamPat

Leydig

Patent reexamination counsel·3 ex parte reexams

Leydig has served as patent-owner counsel in 3 USPTO ex parte reexaminations, with 1 currently open. The firm most often represents Cytiva US LLC, PALL AUSTRALIA PTY LTD., and Will Semiconductor (Shanghai) Co. Ltd.. ExamPat indexes the full prosecution record for each proceeding, including office-action grounds, certificate outcomes, and downstream PTAB and Federal Circuit decisions.

Filings by year

1
19
2
24

Top patent owners represented

Outcome track record

How this firm's reexams resolve once a certificate issues: all claims confirmed, amended, mixed, or canceled.

  • Certificate outcome split across every bucket
  • Share of proceedings where claims survived

Practice metrics

Certificate rate, average pendency, and the open/closed split across the firm's full reexam docket.

  • Certificate rate of closed proceedings
  • Average pendency in months

Examiners & adversaries

Which examiners most often decide this firm's reexams, and which requesters most often challenge its patents.

  • Most frequent examiners
  • Top opposing requesters

Recent reexaminations (3)

Control #FiledPatentTitleOwnerStatus
90/019,586Jul 18, 202411,787,680FLUID DISTRIBUTION SYSTEM WITH SINGLE USE MANIFOLD FLUID RECOVERY ASSEMBLYCytiva US LLCOpen
90/019,587Jul 18, 202411,814,200FLUID DISTRIBUTION SYSTEM WITH SINGLE USE MANIFOLD ASSEMBLY FOR SCALED FILLINGPALL AUSTRALIA PTY LTD.Closed
90/014,285Apr 12, 20199,829,614Optical Sensor Using CollimatorWill Semiconductor (Shanghai) Co. Ltd.Closed

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