Prosecution Insights
Last updated: April 19, 2026
Application No. 18/752,859

GAS DISTRIBUTION ELEMENT AND HEAT TREATMENT DEVICE CONTAINING THE SAME

Non-Final OA §102§112
Filed
Jun 25, 2024
Examiner
DANDRIDGE, CHRISTOPHER R.
Art Unit
3752
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Beijing E-Town Semiconductor Technology Co. Ltd.
OA Round
1 (Non-Final)
65%
Grant Probability
Favorable
1-2
OA Rounds
3y 7m
To Grant
99%
With Interview

Examiner Intelligence

Grants 65% — above average
65%
Career Allow Rate
375 granted / 575 resolved
-4.8% vs TC avg
Strong +38% interview lift
Without
With
+38.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
58 currently pending
Career history
633
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
47.6%
+7.6% vs TC avg
§102
25.9%
-14.1% vs TC avg
§112
20.8%
-19.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 575 resolved cases

Office Action

§102 §112
DETAILED ACTION 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 . Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claim 6 is 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. Claims 6 and 15 recite the limitation “the holes.” It is unclear whether the limitation refers holes in the first region, second region, or both regions. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1-5 and 9-14 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Wang (US 7,476,291). Regarding clam 1, Wang discloses a gas distribution element, comprising at least two regions (Examiner’s Annotated Figure 1, Region 1, Region 4) with different hole distribution densities (Figure 2, The holes in region 4 are greater than that of region 1, which provides for a greater hole distribution density of region 4). PNG media_image1.png 594 628 media_image1.png Greyscale Examiner’s Annotated Figure 1 Regarding claim 2, Wang discloses the gas distribution element of claim 1, wherein the gas distribution element comprises a first region (Region 1) defined by a first distance radially extending outward from a geometric center (Figure 2, the distance from the innermost edge of the openings in region 1 to the outermost edge of the openings in region 1), and a second region (Region 4) defined by a second distance radially extending from an outermost edge toward the geometric center (Figure 2, the distance from the outermost edge of the openings in region 4 to the innermost edge of the openings in region 4); and the first region and the second region respectively have holes with different distribution densities (The density of Region 4 is larger than that of Region 1). Regarding claim 3, Wang discloses the gas distribution element of claim 2, further comprising at least one third region (Region 3) located between the first region and the second region (Figure 2), wherein the third region has a hole distribution density different from those of the first region and the second region (The density of Region 3 is smaller than that of Region 4 and larger than that of Region 1). Regarding claim 4, Wang discloses the gas distribution element of claim 2, wherein a ratio of the hole distribution densities of the first region (Region 1) and the second region (Region 4) is 1:(2-4) (The inner region has 8 holes and the second region has 24 holes, which is equivalent to a 1:3 ratio). Regarding claim 5, Wang discloses the gas distribution element of claim 3, wherein a ratio of the hole distribution densities of the first region (Region 1) and the third region (Region 3) is 1:(2-8) (Region 1 has 8 holes and Region 3 has 16 holes, which is equivalent to a 1:2 ratio). Regarding claim 9, Wang discloses a heat treatment device, comprising a gas distribution element (112), wherein the gas distribution element comprises at least two regions (04, 05) with different hole distribution densities (Examiner’s Annotated Figure 1). Regarding claim 10, Wang discloses the heat treatment device of claim 9, wherein the gas distribution element (112) is arranged on an inner side of a side wall (102) at a gas inlet end (The element is arranged at an inlet end about opening 110) of the heat treatment device (100) (Figure 1). Regarding claim 11, Wang discloses the heat treatment device of claim 9, wherein the gas distribution element comprises a first region (Region 1) defined by a first distance radially extending outward from a geometric center (Figure 2, the distance from the innermost edge of the openings in region 1 to the outermost edge of the openings in region 1), and a second region (Region 4) defined by a second distance radially extending from an outermost edge toward the geometric center (Figure 2, the distance from the outermost edge of the openings in region 4 to the innermost edge of the openings in region 4); and the first region and the second region respectively have holes with different distribution densities (The density of Region 4 is larger than that of Region 1). Regarding claim 12, Wang discloses the heat treatment device of claim 11, wherein the gas distribution element further comprises at least one third region (Region 3) located between the first region and the second region (Figure 2), wherein the third region has a hole distribution density different from those of the first region and the second region (The density of Region 3 is smaller than that of Region 4 and larger than that of Region 1). Regarding claim 13, Wang discloses the heat treatment device of claim 11, wherein a ratio of the hole distribution densities of the first region (Region 1) and the second region (Region 4) is 1:(2-4) (The inner region has 8 holes and the second region has 24 holes, which is equivalent to a 1:3 ratio). Regarding claim 14, Wang discloses the heat treatment device of claim 11, wherein a ratio of the hole distribution densities of the first region (Region 1) and the third region (Region 3) is 1:(2-8) (Region 1 has 8 holes and Region 3 has 16 holes, which is equivalent to a 1:2 ratio). Claim(s) 1-2, 6-8, 9, 11 and 15-17 are rejected under 35 U.S.C. 102(a)(1)as being anticipated by Mao (CN 111599720). Regarding clam 1, Mao discloses a gas distribution element, comprising at least two regions (Figure 6, 05, 04) with different hole distribution densities (Figure 6, The holes in 05 are greater than that of 04). Regarding claim 2, Mao discloses the gas distribution element of claim 1, wherein the gas distribution element comprises a first region (05) defined by a first distance radially extending outward from a geometric center (Figure 6, the distance from the center, outward to the beginning of Region 05 defines the first region), and a second region (04) defined by a second distance radially extending from an outermost edge toward the geometric center (Figure 6, the distance from the outermost edge of 04 to the beginning of 05); and the first region and the second region respectively have holes with different distribution densities (The density of Region 05 is larger than that of 04). Regarding claim 6, Mao discloses the gas distribution element of claim 2, wherein inner diameters of the holes are 1 to 10 mm (Page 2, Contents of the invention, paragraphs 7-8). Regarding claim 7, Mao discloses the gas distribution element of claim 2, wherein inner diameters of the holes are different in different regions (Page 4, paragraph 2, lines 1-4). Regarding claim 8, Mao discloses the gas distribution element of claim 6, wherein the inner diameters of the holes are different in different regions (Page 4, paragraph 2, lines 1-4). Regarding claim 9, Mao discloses a heat treatment device, comprising a gas distribution element (Abstract, gas distribution plate), wherein the gas distribution element comprises at least two regions (04, 05) with different hole distribution densities (Figure 6). Regarding claim 11, Mao discloses the heat treatment device of claim 9, wherein the gas distribution element comprises a first region (05) defined by a first distance radially extending outward from a geometric center (Figure 6, the distance from the center, outward to the beginning of Region 05 defines the first region), and a second region (04) defined by a second distance radially extending from an outermost edge toward the geometric center (Figure 6, the distance from the outermost edge of 04 to the beginning of 05); and the first region and the second region respectively have holes with different distribution densities (The density of Region 05 is larger than that of 04). Regarding claim 15, Mao discloses the heat treatment device of claim 11, wherein inner diameters of the holes are 1 to 10 mm (Page 2, Contents of the invention, paragraphs 7-8). Regarding claim 16, Mao discloses the heat treatment device of claim 11, wherein inner diameters of the holes are different in different regions (Page 4, paragraph 2, lines 1-4). Regarding claim 17, Mao discloses the heat treatment device of claim 16, wherein the inner diameters of the holes are different in different regions (Page 4, paragraph 2, lines 1-4). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHRISTOPHER R. DANDRIDGE whose telephone number is (571)270-1505. The examiner can normally be reached M-T 9am-7pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Arthur O. Hall can be reached at (571)270-1814. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. CHRISTOPHER R. DANDRIDGE Primary Examiner Art Unit 3752 /CHRISTOPHER R DANDRIDGE/Primary Examiner, Art Unit 3752
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Prosecution Timeline

Jun 25, 2024
Application Filed
Jan 31, 2026
Non-Final Rejection — §102, §112 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
65%
Grant Probability
99%
With Interview (+38.1%)
3y 7m
Median Time to Grant
Low
PTA Risk
Based on 575 resolved cases by this examiner. Grant probability derived from career allow rate.

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