Prosecution Insights
Last updated: October 04, 2026

Examiner: CALLAWAY, SPENCER THOMAS

Tech Center 3600 • Art Units: 3642 3643

This examiner grants 37% of resolved cases

Analysis

Spencer Thomas Callaway works in Tech Center 3600 and Art Unit 3642. He has 120 resolved cases. His allowance rate is 36.7 percent. This 36.7 percent rate indicates the frequency of patent grants for applications assigned to his docket in Art Unit 3642.

The interview lift for this examiner is 16.1 percent. This 16.1 percent lift shows the impact of interviews on the likelihood of allowance. For the 120 resolved cases, the data indicates a positive correlation between oral advocacy and successful outcomes. Practitioners should consider this 16.1 percent lift when deciding whether to engage in an interview to resolve outstanding issues.

The median days to allowance is 970. This 970 day figure represents the typical duration of the prosecution process from filing to grant. The 970 day median provides a clear expectation for the time required to reach a successful outcome. Applicants can use the 36.7 percent allowance rate and the 970 day median to plan their timelines effectively in Tech Center 3600.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

36.7%
Allow Rate
-15.3% vs TC avg
161
Total Applications
+16.1%
Interview Lift
970
Avg Prosecution Days
Based on 120 resolved cases, 2023–2026

Rejection Statute Breakdown

0.2%
§101 Eligibility
15.1%
§102 Novelty
59.7%
§103 Obviousness
23.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18910145 PLANT EMERGENCE MONITORING SYSTEMS Non-Final OA Deere & Company
18281268 METHOD AND SYSTEM FOR PROVIDING LIGHT TO A CANNABIS PLANT Non-Final OA SIGNIFY HOLDING B.V.
18984004 METHOD FOR ACCELERATING PLANT CROP CYCLE Final Rejection Monsanto Technology LLC
19159405 VERTICAL ROTARY PLANT CULTIVATION SYSTEM Final Rejection CLAY BUILDING CO., LTD.
19323213 Spreading Device and System Non-Final OA Bonsai Robotics Inc.
19308911 Adjustable Teat Treatment Apparatus and Method Non-Final OA Robovine, LLC
18939859 ORGANIC MATERIAL PELLETS Final Rejection The Andersons Inc.
19087738 ANIMAL TOILET Final Rejection DAIKI Co., Ltd.
19013134 EXCREMENT TREATMENT MATERIAL AND METHOD FOR MANUFACTURING THE SAME Non-Final OA DAIKI Co., Ltd.
18561303 SILICIC ACID IN AQUACULTURE Non-Final OA Barlaa B.V.
18582472 PLANT GROWTH CONTAINER Final Rejection Gardyn Inc.
18993343 ANIMAL EXCREMENT SCREENER Non-Final OA PETKIT Network Technology (Shanghai) Co., Ltd.
19008621 System for Optimizing Plant Growth and Plant Yield Final Rejection ACCELERATED ANALYTICAL, INC.
18982213 CONFIGURABLE AND MODULAR LASER COMPONENT FOR TARGETING SMALL OBJECTS Final Rejection Verdant Robotics, Inc.
18883012 ANTI-PULLING ANIMAL COLLAR Final Rejection Radio Systems Corporation
18843292 MOBILE WEED CONTROL/ DESUCKERING EQUIPMENT Non-Final OA Spezia S.r.L.
18776552 Control System for Robotic Milking Systems Non-Final OA AMS GALAXY USA, LLC
18710525 GREENING SYSTEM AND METHOD OF INSTALLING THE SAME Final Rejection KAWADA INDUSTRIES, INC.
18696885 PEST CONTROL APPARATUS AND METHODS Non-Final OA Oxitec Limited
18692010 AN APPARATUS FOR COMBATTING WEEDS WITH HEATED AIR Final Rejection TWC SYSTEMS BV
18566212 ELASTIC TEAT CUP LINER WITH ENHANCED FUNCTIONALITY Final Rejection JAKOB MAIER UND WILFRIED HATZACK ERFINDER GBR
18562453 APPARATUS AND METHOD WITH DYNAMIC INTERFACE FOR MECHANICAL, SELECTIVE WEED CONTROL IN CROPS INCLUDING TURFGRASSES Non-Final OA SWARD LLC
18024521 AGRO-PHOTOVOLTAIC MODULE Non-Final OA BING KLIMA LTD
18100867 CULTIVATION SYSTEM AND METHOD Final Rejection Burnette Consulting, Inc.

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