Prosecution Insights
Last updated: April 19, 2026
Application No. 17/793,896

SEMICONDUCTOR LIGHT-EMITTING ELEMENT COLLECTING METHOD AND SEMICONDUCTOR LIGHT-EMITTING ELEMENT COLLECTING METHOD USING SAME

Final Rejection §103
Filed
Jul 19, 2022
Examiner
APENTENG, JESSICA MCMILLAN
Art Unit
2875
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
LG Electronics Inc.
OA Round
3 (Final)
66%
Grant Probability
Favorable
4-5
OA Rounds
2y 9m
To Grant
84%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allow Rate
636 granted / 969 resolved
-2.4% vs TC avg
Strong +18% interview lift
Without
With
+18.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
68 currently pending
Career history
1037
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
59.1%
+19.1% vs TC avg
§102
29.1%
-10.9% vs TC avg
§112
7.0%
-33.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 969 resolved cases

Office Action

§103
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 § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 1-10, 11, 13, 15, 16, 17, 18 and 19 is/are rejected under 35 U.S.C. 103 as being unpatentable over Ahmed et al. (US 10,361,337 B2) in view of Bernard (US 2010/0047117 A1). Regarding claim 1, Ahmed et al. teaches a semiconductor light-emitting element collecting apparatus, comprising: PNG media_image1.png 715 440 media_image1.png Greyscale a housing (tank 1202; figure 12) configured to accommodate a fluid (1208; see figure 12) and semiconductor light-emitting elements (micro LED chips 1206, figure 12) therein; a rotation generator (fluid flow 1210; figure 12) configured to rotate the fluid accommodated in the housing (1202; figure 12); and a fluid remover (see figure 12 where the fluid 1208 is removed from a bottom surface of the tank 1202) configured to remove the fluid (1208) accommodated in the housing (tank 1202), wherein the semiconductor light-emitting elements (micro LED chips 1206) are settled on a bottom surface of the housing (tank 1202) by a rotation of the fluid accommodated in the housing (see figure 12, fluid flow of 1210 rotating and collecting the LEDs 1206 in tank 1202). Ahmed et al. does not explicitly teach wherein the rotation generator generates a vortex by rotating the fluid accommodated in the housing, so that the semiconductor light-emitting elements dispersed in the housing are concentrated toward a central portion of the housing. PNG media_image2.png 504 301 media_image2.png Greyscale Bernard teaches wherein the rotation generator generates a vortex by rotating the fluid (liquid mass 200; paragraph [0054]; figure 3) accommodated in the housing (see paragraph [0023] where rotation of liquid to create a vortex is disclosed), so that the light-emitting element (600) dispersed in the housing is concentrated toward a central portion of the housing (100). It would have been obvious to one having ordinary skill in the art before the time of the effective filing date of the invention to modify Ahmed et al. to generate a vortex by rotating the fluid accommodated in the housing as taught by Bernard to ensure a condenser and uniform mixing of the liquid mass is generated (see paragraph [0055] of Bernard). Regarding claim 2, Ahmed et al. teaches the semiconductor light-emitting element collecting apparatus of claim 1, wherein the housing (tank 1202; figure 12) comprises an opening formed in at least an opposite side to the bottom surface of the housing (see opening in tank 1202 in at least figure 12). Regarding claim 3, Ahmed et al. teaches the semiconductor light-emitting element collecting apparatus of claim 2, wherein the housing (tank 1202) tapered in width from the opening to the bottom surface (see at least figure 12 where tank 1202 is tapered from the opening to the bottom surface; column 11, lines 14-45). Regarding claim 4, Ahmed et al. teaches the semiconductor light-emitting element collecting apparatus of claim 1, wherein the rotation generator (fluid flow 1210) rotates the fluid accommodated in the housing (tank 1202) centering on a symmetry axis of the housing (tank 1202; see column 11, lines 14-45 and at least figure 12). Regarding claim 5, Ahmed et al. teaches the semiconductor light-emitting element collecting apparatus of claim 1, wherein the rotation generator (fluid flow 1210; figure 12) rotates the fluid accommodated in the housing (tank 1202) while moving from an edge to the central portion of the housing (1202; see at least 12 and column 11, lines 14-45 “Fluid flow 1210 is depicted by the arrows for continued circulation of the micro LED chips 1206 over the surface of the substrate 1204 . The substrate 1204 may be a " temporary carrier plate " or the actual display backplane . A gas inlet 1212 provides gas (such as nitrogen ) to generate fluid flow .”). Regarding claim 6, Ahmed et al. teaches a method for collecting semiconductor light-emitting elements (micro LED chips 1206; figure 12), the method comprising: feeding a fluid (1208; figure 12) and the semiconductor light-emitting elements (1206; figure 12) to a housing (1202); rotating the fluid (see fluid flow 1208 in at least figure 12) accommodated in the housing (tank 1202) so that the semiconductor light-emitting elements (1206; figure 12) accommodated in the housing (1202; figure 12) are settled on a bottom surface of the housing (1202; figure 12); removing the fluid (1208; figure 12) accommodated in the housing (1202; figure 12) in a state where the semiconductor light-emitting elements (1206; figure 12) accommodated in the housing (1202) are settled on the bottom surface of the housing (see figure 12; tank 1202); and collecting the semiconductor light-emitting elements (1206; see at least figure 12) settled on the bottom surface of the housing (1202). Ahmed et al. does not explicitly teach wherein the rotation generator generates a vortex by rotating the fluid accommodated in the housing, so that the semiconductor light-emitting elements dispersed in the housing are concentrated toward a central portion of the housing. PNG media_image2.png 504 301 media_image2.png Greyscale Bernard teaches wherein the rotation generator generates a vortex by rotating the fluid (liquid mass 200; paragraph [0054]; figure 3) accommodated in the housing (see paragraph [0023] where rotation of liquid to create a vortex is disclosed), so that the light-emitting element (600) dispersed in the housing is concentrated toward a central portion of the housing (100). It would have been obvious to one having ordinary skill in the art before the time of the effective filing date of the invention to modify Ahmed et al. to generate a vortex by rotating the fluid accommodated in the housing as taught by Bernard to ensure a condenser and uniform mixing of the liquid mass is generated (see paragraph [0055] of Bernard). Regarding claim 7, Ahmed et al. teaches the method of claim 6, wherein the housing (tank 1202; figure 12) comprises an opening in at least an opposite side to the bottom surface of the housing (see tank 1202 in at least figure 12), and is tapered in width from the opening to the bottom surface (see tank 1202 where from the opening to the bottom surface there is a taper). Regarding claim 8, Ahmed et al. teaches the method of claim 6, wherein the rotating is carried out to rotate the fluid (1208; see at least figure 12) accommodated in the housing (1202) centering on a symmetry axis of the housing (tank 1202; figure 12). Regarding claim 9, Ahmed et al. teaches the method of claim 6, wherein the rotating starts at an edge of the housing (1202; figure 12) and ends at a center of the housing (see figure 12 where 1210 enters the housing 1202 at a center). Regarding claim 10, Ahmed et al. teaches the method of claim 6, wherein the feeding, the rotating, the removing and the collecting are performed after some of the semiconductor light-emitting elements (micro LEDs 1206; figure 12) are seated on preset positions of a substrate (1204; figure 12) within a chamber containing the fluid (1208; see at least figure 12). Regarding claim 11, Ahmed et al. teaches the method of claim 6, wherein the removing of the fluid (1208; figure 12) is performed by a fluid remover (see figure 12 where the fluid 1208 is removed from a bottom surface of the tank 1202). Regarding claim 13, Ahmed et al. teaches the semiconductor light-emitting element collecting apparatus of claim 3, wherein a size of the opening is greater than a size of the bottom surface (see opening in tank 1202 in at least figure 12). Regarding claim 15, Ahmed et al. teaches the semiconductor light-emitting element collecting apparatus of claim 1, wherein the fluid remover is a pump (see figure 12 where the fluid 1208 is removed from a bottom surface of the tank 1202). Regarding claim 16, Ahmed et al. teaches a collecting apparatus for semiconductor light-emitting elements (micro LED chips 1206), the collecting apparatus comprising: a housing (tank 1202) configured to collect the semiconductor light-emitting elements (micro LED chips 1206) therein, and configured to accommodate a fluid (1208) and the semiconductor light-emitting elements (1206) suspended in the fluid; and a rotation generator (fluid flow 1210; figure 12) to control rotation of the fluid accommodated in the housing (tank 1202) to enable the semiconductor light-emitting elements (1206; figure 12) to settle at a bottom surface of the housing (tank 1202). Ahmed et al. does not explicitly teach wherein the rotation generator generates a vortex by rotating the fluid accommodated in the housing, so that the semiconductor light-emitting elements dispersed in the housing are concentrated toward a central portion of the housing. PNG media_image2.png 504 301 media_image2.png Greyscale Bernard teaches wherein the rotation generator generates a vortex by rotating the fluid (liquid mass 200; paragraph [0054]; figure 3) accommodated in the housing (see paragraph [0023] where rotation of liquid to create a vortex is disclosed), so that the light-emitting element (600) dispersed in the housing is concentrated toward a central portion of the housing (100). It would have been obvious to one having ordinary skill in the art before the time of the effective filing date of the invention to modify Ahmed et al. to generate a vortex by rotating the fluid accommodated in the housing as taught by Bernard to ensure a condenser and uniform mixing of the liquid mass is generated (see paragraph [0055] of Bernard). Regarding claim 17, Ahmed et al. teaches the collecting apparatus of claim 16, wherein an arc of rotation of the rotation generator (see figure 12 where fluid flow 1210 rotates through the housing 1202) is decreased from an inside edge of the housing (see figure 12 where the fluid flow 1210 has an arc of rotation that decreases when entering a top edge of tank 1202) towards the central portion of the housing (see figure 12 where 1210 enters the housing 1202 at a center) to enable the semiconductor light-emitting elements (micro LED chips 1206) to settle at the bottom surface of the housing (tank 1202) when the rotation generator (fluid flow 1210; figure 12) is rotating at the central portion (see figure 12). Regarding claim 18, Ahmed et al. teaches the collecting apparatus of claim 16, further comprising a fluid remover see figure 12 where the fluid 1208 is removed from a bottom surface of the tank 1202) to remove the fluid accommodated in the housing (tank 1202) after the semiconductor light-emitting elements (micro LED chips 1206) settle at the bottom surface of the housing (tank 1202; figure 12). Regarding claim 19, Ahmed et al. teaches the collecting apparatus of claim 16, wherein the housing (tank 1202; figure 12) comprises an opening formed at an opposite side to the bottom surface of the housing (tank 1202; figure 12), and wherein a size of the opening is greater than a size of the bottom surface (see at least figure 12 where tank 1202 is tapered from the opening to the bottom surface; column 11, lines 14-45 “Fluid flow 1210 is depicted by the arrows for continued circulation of the micro LED chips 1206 over the surface of the substrate 1204 . The substrate 1204 may be a " temporary carrier plate " or the actual display backplane. A gas inlet 1212 provides gas (such as nitrogen) to generate fluid flow.”). Claim(s) 12, 14 and 20 are rejected under 35 U.S.C. 103 as being unpatentable over Ahmed et al. (US 10,361,337 B2) in view of Bernard (US 2010/0047117 A1) as applied to claims 1, 6 and 14, respectively, above and further in view of Deery et al. (US 2013/0320858 A1). Regarding claim 12, Ahmed et al. teaches the method of claim 6, but does not explicitly teach wherein the housing is transparent. Deery et al. teaches a housing that is transparent ( see paragraph [0028] where outer housing 26 can be constructed of a transparent material). It would have been obvious to one having ordinary skill in the art before the time of the effective filing date of the invention to modify the housing of Ahmed et al. to be transparent as taught by Deery et al. to allow light from the light source to illuminate outward from the housing (see paragraph [0028] of Deery et al.). Regarding claim 14, Ahmed et al. teaches the semiconductor light-emitting element collecting apparatus of claim 1, but Ahmed et al. does not explicitly teach wherein the housing is transparent. Deery et al. teaches a housing that is transparent ( see paragraph [0028] where outer housing 26 can be constructed of a transparent material). It would have been obvious to one having ordinary skill in the art before the time of the effective filing date of the invention to modify the housing of Ahmed et al. to be transparent as taught by Deery et al. to allow light from the light source to illuminate outward from the housing (see paragraph [0028] of Deery et al.). Regarding claim 20, Ahmed et al. teaches the collecting apparatus of claim 16, but does not explicitly teach wherein the housing is transparent. Deery et al. teaches a housing that is transparent ( see paragraph [0028] where outer housing 26 can be constructed of a transparent material). It would have been obvious to one having ordinary skill in the art before the time of the effective filing date of the invention to modify the housing of Ahmed et al. to be transparent as taught by Deery et al. to allow light from the light source to illuminate outward from the housing (see paragraph [0028] of Deery et al.). Response to Arguments Applicant’s arguments with respect to claim(s) 1-20 have been considered but are moot in view of new grounds of rejection necessitated by applicant’s amendment of independent claims 1, 6 and 16. Applicant amended claims 1, 6 and 16 to include the limitation, wherein the rotation generator generates a vortex by rotating the fluid accommodated in the housing, so that the semiconductor light-emitting elements dispersed in the housing are concentrated toward a central portion of the housing. A new reference, Bernard (US 2010/0047117 A1), has been found to teach the limitation of the amended claims. Therefore, claims 1, 6 and 16 remain rejected. See rejection above. Dependent claims 2-5, 7-15 and 17-20 are rejected based on dependency on a rejected base claim. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to JESSICA MCMILLAN APENTENG whose telephone number is (571)272-5510. The examiner can normally be reached Monday-Friday 9:00 am-5:00 pm. 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, ABDULMAJEED AZIZ can be reached at 571-270-5046. 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. /JESSICA M APENTENG/Examiner, Art Unit 2875 /ABDULMAJEED AZIZ/Supervisory Patent Examiner, Art Unit 2875
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Prosecution Timeline

Jul 19, 2022
Application Filed
Mar 27, 2025
Non-Final Rejection — §103
Aug 28, 2025
Non-Final Rejection — §103
Dec 04, 2025
Response Filed
Mar 16, 2026
Final Rejection — §103 (current)

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Prosecution Projections

4-5
Expected OA Rounds
66%
Grant Probability
84%
With Interview (+18.3%)
2y 9m
Median Time to Grant
High
PTA Risk
Based on 969 resolved cases by this examiner. Grant probability derived from career allow rate.

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