Prosecution Insights
Last updated: July 17, 2026
Application No. 18/270,966

HAIR STYLING APPLIANCE

Final Rejection §103
Filed
Jul 05, 2023
Priority
Jan 13, 2021 — GB 2100416.3 +1 more
Examiner
YUEN, JESSICA JIPING
Art Unit
3762
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Dyson Technology Limited
OA Round
2 (Final)
60%
Grant Probability
Moderate
3-4
OA Rounds
5m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allowance Rate
671 granted / 1117 resolved
-9.9% vs TC avg
Strong +22% interview lift
Without
With
+21.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
41 currently pending
Career history
1146
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
78.4%
+38.4% vs TC avg
§102
4.7%
-35.3% vs TC avg
§112
10.3%
-29.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1117 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 text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 1, 3-4, 7-8, 10-16 and 18 are rejected under 35 U.S.C. 103 as being unpatentable over Legrain et al. (FR 2707851 A1) in view of Zhu (CN 108433318 A). With regard to claims 1, 4, Legrain et al. discloses a hair styling appliance (Fig. 1) comprising: an airflow unit 4, 5 for generating an airflow; a heating unit 3 for heating the airflow; and a control unit 10 for controlling the airflow unit 4, 5 and the heating unit 3, wherein: the control unit 10 controls the airflow unit 4, 5 and the heating unit 3 in a predefined sequence of modes comprising a first mode (Figs. 3-6, PHASE 1), a second mode (Figs. 3-6, PHASE 2) and a third mode (Figs. 3-6, PHASE 3), the airflow unit 4, 5 having a different flow rate and/or the heating unit having a different heat setting in each of the modes (Figs. 4-6), and the control unit 10 determines when to transition between modes of the predefined sequence (Figs. 1-6, translation, page 4, 3rd paragraph to page 5, line 8), the control unit 10 determines when to transition based on at least one of a time spent in a mode, a presence of hair, and a characteristic of hair (Figs. 3-6). However, Legrain et al. does not disclose wherein the control unit determines when to transition in response to a change in the presence of hair; wherein the characteristic comprises a temperature and/or a moisture content of the hair, and the appliance comprises one or more sensors for sensing the characteristic of the hair. Zhu discloses a hair styling appliance comprising a control unit 2, wherein the control unit 2 determines when to transition in response to a change in the presence of hair (Zhu, translation, page 6, paragraphs 3-8); wherein the characteristic comprises a temperature and/or a moisture content of the hair, and the appliance comprises one or more sensors for sensing the characteristic of the hair (Zhu, translation, page 7, 2nd paragraph from bottom). Therefore, it would have been obvious to someone with ordinary skill in the art before the effective filing date of the invention to modify the hair styling appliance of Legrain et al. to include one or more sensors for sensing the characteristic of the hair, wherein the characteristic comprises a temperature and/or a moisture content of the hair and further modify the control unit of the hair styling appliance of Legrain et al. to include a function of determining when to transition in response to a change in the presence of hair or the characteristic of hair as taught by Zhu in order to automatically select and adjust air blowing mode according to the condition of the hair without requiring the user to a prior knowledge of blowing so as to greatly improve the user experience (Zhu, translation, page 2, lines 10-13). With regard to claim 3, Legrain et al. discloses wherein the control unit 10 determines when to transition in the event that the time spent in a mode and/or a value relating to the characteristic of hair reaches a threshold (Fig. 3). With regard to claim 7, Zhu discloses the controller 2 can decrease or increase speed to adjust the blowing mode previously selected or determined when detecting the electrical blowing hair being close to or being away from the hair under the condition. If detecting the distance from the electric hair dryer to hair is greater than a predetermined threshold (e.g.,50 cm), it indicates blowing mechanism 3 stops blowing (translation, page 7, lines 10-14). Based on above disclosure, Zhu discloses the hair appliance determining a presence of hair based on changes in the airflow or changes in the speed of the air flow unit. Therefore, it would have been obvious to someone with ordinary skill in the art before the effective filing date of the invention to modify the hair styling appliance of Legrain et al. to include determining a presence of hair based on changes in the airflow or changes in the speed of the air flow unit as taught Zhu in order to automatically select and adjust air blowing mode according to the condition of the hair without requiring the user to a prior knowledge of blowing so as to greatly improve the user experience (Zhu, translation, page 2, lines 10-13). With regard to claim 8, Legrain et al. discloses wherein the control unit 10 automatically transitions between modes in response to determining when to transition (Figs. 3-6, translation, page 4, 3rd paragraph to page 5, line 8). With regard to claim 10, Legrain et al. discloses wherein the heat setting in the third mode is lower than the heat settings in the first and second modes (see temperature settings in Figs. 4-6). With regard to claim 11, Legrain et al. discloses wherein the flow rate in the third mode is lower than the flow rates in the first and second modes (see flow rate settings in Figs. 4-6). With regard to claim 12, Legrain et al. discloses wherein the flow rate and/or the heat setting in the second mode is lower than that in the first mode (Figs. 4-5). With regard to claim 13, Legrain et al. discloses wherein the sequence of modes comprises a fourth mode, and the heat setting in the fourth mode is lower than that in the third mode (translation, page 5, lines 6-8 disclose a button 8 for switching on and off the hair dryer, the switch off state of the appliance is considered a fourth mode). With regard to claim 14, Legrain et al. discloses wherein the sequence of modes comprises a mode in which the airflow unit and/or the heating unit are powered off (translation, page 5, lines 6-8 disclose a button 8 for switching on and off the hair dryer, the switch off state of the appliance is considered a mode in which the airflow unit and the heating unit are powered off). With regard to claim 15, Legrain et al. discloses wherein the control unit 10 receives user data, and the control unit uses the user data to determine when to transition (Figs. 3-6, translation, page 5, lines 24-29, claims 5-6). With regard to claim 16, Legrain et al. discloses wherein the user data comprises any of: hair thickness, hair length, natural hair style, hair condition, presence of hair product, and presence of hair dye (Fig. 3, claim 5). With regard to claim 18, Legrain et al. discloses wherein the control unit 10 initiates the sequence of modes in response to a user input (Fig. 2, translation, page 4, lines 3-28). Claim 6 is rejected under 35 U.S.C. 103 as being unpatentable over Legrain et al. (FR 2707851 A1) in view of Zhu (CN 108433318 A) as applied to claim 1 as above, and further in view of Alfredo et al. (GB 2517321 A). The hair styling appliance of Legrain et al. as modified by Zhu as above includes all that is recited in claim 6 except for wherein the appliance comprises a capacitive sensor for sensing the presence of hair. Alfredo et al. discloses a hair styling appliance 10 comprising a capacitive sensor 564 for sensing the presence of hair (page 31, lines 18-19). Therefore, it would have been obvious to someone with ordinary skill in the art before the effective filing date of the invention to further modify the hair styling appliance of Legrain et al. to include a capacitive sensor for sensing the presence of hair as taught by Alfredo et al. in order to detect the presence of hair without direct contact and provide reliable and efficient measurement solution. Claim 9 is rejected under 35 U.S.C. 103 as being unpatentable over Legrain et al. (FR 2707851 A1) in view of Zhu (CN 108433318 A) as applied to claim 1 as above, and further in view of Matsuo et al. (CN 107949293 A). The hair styling appliance of Legrain et al. as modified by Zhu as above includes all that is recited in claim 9 except for wherein the control unit generates a user alert in response to determining when to transition, and the control unit transitions between modes in response to a user input. Matsuo et al. discloses a hair styling appliance 1 comprising a control unit 12 generates a user alert (Figs. 2, 7, by LEDS 31-35) by in response to determining when to transition (paragraphs [0100]-[0102] and corresponding translation), and the control unit 12 transitions between modes in response to a user input (Fig. 2, user input via mode switch 9). Therefore, it would have been obvious to someone with ordinary skill in the art before the effective filing date of the invention to modify the control unit of the hair styling appliance of Legrain et al. to include functions of generating a user alert in response to determining when to transition, and the control unit transitions between modes in response to a user input as taught by Matsuo et al. in order to optimize the operation of hair styling appliance. Claim 17 is rejected under 35 U.S.C. 103 as being unpatentable over Legrain et al. (FR 2707851 A1) in view of Zhu (CN 108433318 A) as applied to claim 15 as above, and further in view of Goldman et al. (US 2018/0027940 A1) The hair styling appliance of Legrain et al. as modified by Zhu as above includes all that is recited in claim 17 except for wherein the appliance comprises a wireless interface for receiving the user data wirelessly from a remote device. Goldman et al. discloses a hair styling appliance 100 comprising a wireless interface 406 for receiving the user data wirelessly from a remote device 214 (Figs. 2, 4, paragraphs [0074], [0076]). Therefore, it would have been obvious to someone with ordinary skill in the art before the effective filing date of the invention to modify the hair styling appliance of Legrain et al. to include a wireless interface for receiving the user data wirelessly from a remote device as taught by Goldman et al. in order to enable any number of hair professionals and/or end consumers to improve styling and dry time and to reduce energy usage to enable a more efficient design (Goldman et al., abstract). Response to Arguments Applicant's arguments filed 4/24/2026 have been fully considered but they are not persuasive. The applicant’s argument with respect to 102 rejection is moot in view of the amendment to claim 1 by incorporating the subject matter of former dependent claim 5 into claim 1. On pages 6-7 of the remarks, the applicant argued that there is no proper motivation to combine Legrain with Zhu. In response to applicant’s argument that there is no teaching, suggestion, or motivation to combine the references, the examiner recognizes that obviousness may be established by combining or modifying the teachings of the prior art to produce the claimed invention where there is some teaching, suggestion, or motivation to do so found either in the references themselves or in the knowledge generally available to one of ordinary skill in the art. See In re Fine, 837 F.2d 1071, 5 USPQ2d 1596 (Fed. Cir. 1988), In re Jones, 958 F.2d 347, 21 USPQ2d 1941 (Fed. Cir. 1992), and KSR International Co. v. Teleflex, Inc., 550 U.S. 398, 82 USPQ2d 1385 (2007). In this case, Legrain is directed to a system in which a selection means 7 for selecting a characteristic parameter of hair (translation, page 4, line 7) and for controlling the manual or automatic mode (translation, page 5, line 8). Zhu discloses an automatic sensing to determine hair characteristics. It would have been obvious to one skill in the art to modify the control unit of the hair styling appliance of Legrain et al. to include automatically control the hair drying mode based on the automatic sensing and determining hair characteristics as taught by Zhu, since it has been held that providing an automatic means to replace a manual activity which accomplished the same result (i.e. determine hair characteristics in current case) is not sufficient to distinguish over the prior art (MPEP 2144.04). 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 J YUEN whose telephone number is (571)272-4878. The examiner can normally be reached Monday-Friday 9am-5pm. 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, MICHAEL G HOANG can be reached at (571) 272-6460. 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 Yuen/ Primary Examiner Art Unit 3762 JY
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Prosecution Timeline

Jul 05, 2023
Application Filed
Jan 27, 2026
Non-Final Rejection mailed — §103
Apr 24, 2026
Response Filed
Jun 03, 2026
Final Rejection mailed — §103 (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

3-4
Expected OA Rounds
60%
Grant Probability
82%
With Interview (+21.6%)
3y 5m (~5m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1117 resolved cases by this examiner. Grant probability derived from career allowance rate.

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