Prosecution Insights
Last updated: May 29, 2026
Application No. 17/938,304

CARBON BLACK COMBUSTIBLE GAS SEPARATION

Non-Final OA §112
Filed
Oct 05, 2022
Priority
Feb 03, 2015 — provisional 62/111,317 +2 more
Examiner
HENDRICKSON, STUART L
Art Unit
1736
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Monolith Materials Inc.
OA Round
5 (Non-Final)
72%
Grant Probability
Favorable
5-6
OA Rounds
0m
Est. Remaining
80%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
708 granted / 979 resolved
+7.3% vs TC avg
Moderate +8% lift
Without
With
+8.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
30 currently pending
Career history
1017
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
79.8%
+39.8% vs TC avg
§102
0.7%
-39.3% vs TC avg
§112
8.2%
-31.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 979 resolved cases

Office Action

§112
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. The RCE is accepted. Claims 18, 20, 21, 23-29, 32-42 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. It is unclear how in claim 18 step c the filtering the carbon from the effluent stream (bag filter, for example) removes materials from the pores thereof. It appears that step d is what accomplishes this. In step d, ‘downstream air processing equipment’ is unclear. Where did the air come from? Is air being processed? What are the components of this system? What does air have to do with a hydrogen plasma method for making carbon black from (presumably) methane/hydrocarbon? Is air added to the carbon after the treatment of step d? Applicant's arguments filed 2/24/26 have been fully considered but they are not persuasive. While the prior art rejections have been withdrawn due to the amendments, some discussion of the Declaration is warranted. It is unclear what ‘normalized/apples to apples’ means. Was there some manipulation of the data? Why would that be necessary? Declaration paragraphs 13-15 do not support (with data) the argument that the previously applied references would be unable to remove both H2 and PAHs. It is unclear why these paragraphs assume that H2 forms a solid phase. The argument in paragraph 16 seems to be that Yurovskaya wouldn’t treat the material made by the present process because it is already in compliance with their purity standards. However, it is also implied in the arguments that hydrogen in carbon black pores is a long-standing recognized safety problem. This implication has not been established (‘longfelt need’) and it would appear that, if true, it would have been the source of research efforts for many years, given the amount of carbon black used in tires each year and the number of companies throughout the world that make carbon black. Furthermore, it overlooks the well-known use of vacuum/low pressure to de-gas substances including carbon black. Are there numerous incidents of carbon black shipments exploding? Is sending carbon black to tire companies known to be dangerous? If this was a widespread problem, it would seem extremely obvious to use vacuum desorption to remove dangerous gases- assuming that the cause of the explosions was traced to the residual gases. Also, shipping carbon black in powder form would be inherently dangerous due to spontaneous explosion such as happens in grain silos. Is carbon black usually shipped in pelletized form? There needs to be more documents detailing the state of the art in carbon black distribution to get a better picture of the scope of this issue. Paragraph 20 is essentially a ‘commercial success’ argument tangential (or unrelated) to the alleged safety problem/level of hydrogen. The ‘sustainability’ award appears to be unrelated to the issues at hand, since it refers to CO2 emissions. It is also not entirely clear that the ‘methane pyrolysis’ cited in the Goodyear announcement is the same as ‘H2-plasma of hydrocarbon’ and whether it is the low H2 in the pores that makes it an attractive material for ‘enhanced all-season traction, for the ultra-high performance’ specialty tire. Any inquiry concerning this communication or earlier communications from the examiner should be directed to STUART L HENDRICKSON whose telephone number is (571)272-1351. The examiner can normally be reached on Monday-Friday from 9 to 5. If attempts to reach the examiner by telephone are unsuccessful, the examiner's supervisor, Anthony Zimmer, can be reached on 571-270-3591. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. /STUART L HENDRICKSON/Primary Examiner, Art Unit 1736
Read full office action

Prosecution Timeline

Show 8 earlier events
Nov 24, 2025
Final Rejection mailed — §112
Jan 07, 2026
Interview Requested
Jan 20, 2026
Examiner Interview Summary
Jan 20, 2026
Applicant Interview (Telephonic)
Feb 24, 2026
Response after Non-Final Action
Feb 24, 2026
Request for Continued Examination
Mar 03, 2026
Response after Non-Final Action
Apr 01, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

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Patent 12611649
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2y 4m to grant Granted Apr 28, 2026
Patent 12605692
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Patent 12606442
METHODS AND SYSTEMS FOR PRODUCING SOLID INORGANIC CARBONATE AND BICARBONATE COMPOUNDS
3y 1m to grant Granted Apr 21, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
72%
Grant Probability
80%
With Interview (+8.0%)
3y 1m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 979 resolved cases by this examiner. Grant probability derived from career allowance rate.

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