Examiner Mark Ruthkosky
Examiner Mark Ruthkosky appears to be about average relative to their peer examiners. Their lifetime grant ratio is 43.4%, they average 1.35 office actions per granted patent, and their rejection profile is dominated by ยง103.
Difficulty vs AU
Very Easy
Difficulty vs Group
Very Easy
Difficulty vs TC
About Average
Difficulty vs USPTO
About Average
Average OA / Grant
1.35
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Examiner Details
- Observed Examiner Years
- 19 years (2008-2026)
- Tech Center
- 1700 - Chemical and Materials Engineering
- Group
- 1790 - Food, Analytical Chemistry, Sterilization, Biochemistry, Electrochemistry
Metrics
- Applications Evaluated
- 53
- Granted Applications
- 23
- Non-Granted Applications
- 30
- Avg OA / Grant
- 1.35
- Last OA Observed
- February 2026 (4 months ago)
Context Comparison
| Scope | Examiners | Lifetime Grant Ratio | Avg OA / Grant |
|---|---|---|---|
| This Examiner | 1 | 43.4% | 1.35 |
| Art Unit | 44 | 40.4% | 1.85 |
| Group | 307 | 37.1% | 2.11 |
| Tech Center | 1,713 | 47.3% | 2.14 |
| USPTO | 16,116 | 54.8% | 1.98 |
Grant Timeline
Shaded region marks the last two observed years, where grant outcomes may lag due to recency.
| Year | Applications | Granted | Grant Rate |
|---|---|---|---|
| No observed data before 2008; examiner may not yet have been active in the available dataset. | |||
| 2008 | 27 | 17 | 63.0% |
| 2009 | 4 | 2 | 50.0% |
| 2010 | 1 | 0 | 0.0% |
| No observed data for 2011. | |||
| 2012 | 2 | 0 | 0.0% |
| No observed data for 2013. | |||
| 2014 | 4 | 1 | 25.0% |
| No observed data for 2015-2016. | |||
| 2017 | 1 | 0 | 0.0% |
| 2018 | 1 | 1 | 100.0% |
| No observed data for 2019-2024. | |||
| 2025 | 10 | 2 | 20.0% |
| 2026 | 3 | 0 | 0.0% |
23 family-cache-validated grants; 0 OA-only grant signals.
Rejection Timeline
| OA # | Office Actions | § 101 Percentage | § 102 Percentage | § 103 Percentage | § 112 Percentage |
|---|---|---|---|---|---|
| 1 | 47 | 0.0% | 12.8% | 78.7% | 4.3% |
| 2 | 18 | 0.0% | 0.0% | 88.9% | 5.6% |
| 3 | 5 | 0.0% | 0.0% | 100.0% | 0.0% |
| 4 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
| 5 | 2 | 0.0% | 0.0% | 100.0% | 0.0% |
| 6 | 2 | 0.0% | 0.0% | 100.0% | 0.0% |
| 7 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |