Prosecution Insights
Last updated: April 19, 2026
Application No. 18/009,280

MULTI-CARTRIDGE AND AEROSOL GENERATION DEVICE INCLUDING THE SAME

Non-Final OA §103
Filed
Dec 08, 2022
Examiner
DIYAN, OLUWATOSIN OLUWATUMININ
Art Unit
1755
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Kt&G Corporation
OA Round
3 (Non-Final)
20%
Grant Probability
At Risk
3-4
OA Rounds
3y 1m
To Grant
99%
With Interview

Examiner Intelligence

Grants only 20% of cases
20%
Career Allow Rate
1 granted / 5 resolved
-45.0% vs TC avg
Strong +100% interview lift
Without
With
+100.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
43 currently pending
Career history
48
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
62.0%
+22.0% vs TC avg
§102
19.4%
-20.6% vs TC avg
§112
16.5%
-23.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 5 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 . Status of the Claims Claims 1-8 and 10-11 are currently pending and are subject to this office action. Claim 9 is canceled. Claims 1, 10, and 11 are amended. This office action is in response to Applicant’s amendment filed on 12/09/2025. Response to Amendments Examiner acknowledges Applicant’s response filed on 12/09/2025 containing amendments and remarks to the claims. Response to Arguments Applicant’s arguments, on pages 7-10, filed 11/2025, with respect to the rejection of claim 1 under 35 U.S.C. 103 have been fully considered and are persuasive. The Applicant has amended claim 1 to include limitations of previously presented claim 10 and a limitation that was not previously presented, specifically, “wherein the first rotary plate comprises a first hole and a second hole, a size of the first hole being different from a size of the second hole, and wherein the first rotary plate is configured to, by rotation, cause at least one of the first hole and the second hole to be placed on the first transfer path adjust the degree of opening of the first transfer path based on the size of the first hole and the size of the second hole”. However, upon further consideration, a new ground(s) of rejection is made in view of Zhao (CN 111671155 A). The following are modified rejections based on Applicant’s amendments to the claims. Claim Objections Claim 1 is objected to because of the following informalities: Line 18: “path adjust the degree” should read “path and adjust the degree” Appropriate correction is required. Claim 11 is objected to because of the following informalities: Line 18: “path adjust the degree” should read “path and adjust the degree” Appropriate correction is required. 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. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claims 1, 2, 3, 4, 5, 8, 10, and 11 are rejected under 35 U.S.C. 103 as being unpatentable over Bless (US 20180160732 A1), and further in view of Hermiz (US 10721973 B1) and Zhao (CN 111671155 A, hereinafter citations referring to English Machine Translation). PNG media_image1.png 177 370 media_image1.png Greyscale PNG media_image2.png 349 335 media_image2.png Greyscale With regard to Claim 1, Bless, directed to a smoking article and cartridge teaches (i) a smoking article comprising a reservoir with two or more divided chambers (Fig. 2: #318A-C) comprising different aerosol precursor compositions [0032]. (ii) The liquid in the chambers (Fig. 2: #318A-C) are atomized by an aerosol forming arrangement, in the form of a heating element, for atomization [0034]. (iii) The smoking article further comprises two or more aligned discs (Fig. 5A: #338A & Fig. 5B: #338B), relating to the adjusting member of the claimed invention, that are rotatable such that based on the two discs alignment in communication with chambers (Fig. 2: #318A-C), the quantity of received aerosol precursor composition can be adjusted [0048]. (iv) One of ordinary skill in the art would understand the composition delivered from the chambers is based on the rotation of the discs (Fig. 5A: #338A & Fig. 5B: #338B) and that blocking one chamber would result in an increase in quantity for another to help a consumer selectively control the quantity of an aerosol composition [0003]. (v) The first disc (Fig. 5A: #338A) is aligned with liquid delivery path of the first chamber (Fig. 2: #320A, [0044]). wherein the first liquid composition and the second liquid composition are respectively delivered to the vaporizing element through a first transfer path and a second transfer path wherein the first rotary plate comprises a first hole and a second hole, a size of the first hole being different from a size of the second hole wherein the first rotary plate is configured to, by rotation, cause at least one of the first hole and the second hole to be placed on the first transfer path adjust the degree of opening of the first transfer path based on the size of the first hole and the size of the second hole PNG media_image3.png 696 455 media_image3.png Greyscale In regards to i., Hermiz, directed to an electronic smoking device, teaches (i) first and second reservoirs (Fig. 10: #122 & #14) comprising separate liquid compositions [33]. The liquid compositions are delivered separately to separate heating elements (Fig. 10: #136 & #138, [29]). One of ordinary skill in the art would find it obvious to combine the transfer paths of Hermiz with Bless to improve isolated and independent delivery of different liquid compositions while maintaining adjustable flow control [2]. Therefore, before the effective filing date of the claimed invention, it would have been obvious for one of ordinary skill in the art to modify the first and second liquid reservoir of Bless to wherein the first liquid composition and the second liquid composition are respectively delivered to the vaporizing element through a first transfer path and a second transfer path because both Bless and Hermiz are directed to allowing a user to select from multiple aerosol generating liquids based on preference. Hermiz teaches first and second reservoirs with separate flow paths before reaching a heating element to improve isolated and independent delivery of different liquid compositions while maintaining adjustable flow control [2] and this merely involves applying a known separate path configuration to a known aerosol generation device, ready for improvement, to yield predictable results. In regards to ii. and iii., Zhao, directed to an electronic cigarette atomizing device, teaches (ii) an air regulating component in the form of a disc with several through holes of different sizes to help regulate airflow [0056]. (iii) When the disc is rotated, the different sized through holes are connected to an inlet [0056]. The Examiner acknowledges that the holes taught by Zhao are directed to regulating airflow, however, the principle of changing the size of an opening to change/regulate flow would still apply to a fluid like a liquid supply. One of ordinary skill in the art would understand that since airflow passes through the selected through hole, which are of a multitude of sizes, the size of the hole directly determines the area of the airflow path. Thus, it would have been obvious to modify the rotatable discs of modified Bruton to include through holes of different sizes to provide adjustable flow regulation in the device [0056]. Therefore, before the effective filing date of the claimed invention, it would have been obvious for one of ordinary skill in the art to modify the rotary plate of Bless to wherein the first rotary plate comprises a first hole and a second hole, a size of the first hole being different from a size of the second hole and wherein the first rotary plate is configured to, by rotation, cause at least one of the first hole and the second hole to be placed on the first transfer path adjust the degree of opening of the first transfer path based on the size of the first hole and the size of the second hole because both Bless and Zhao are directed to altering flow based on user preferences. Zhao teaches a disc with different sized through holes to provide adjustable flow regulation [0056] and this merely involves combining known restricting elements according to known flow techniques ready for improvement to yield predictable results. PNG media_image4.png 332 441 media_image4.png Greyscale With regard to Claim 2, Bless teaches (i) a housing (Fig. 1: #302) forming a space to accommodate a cartridge (Fig. 1: #300) comprising liquid for generating aerosol [0026]. (ii) A flow tube (Fig. 1: #340), is formed within the cartridge (Fig. 1: #300), to direct aerosol from the aerosol forming arrangement (Fig. 1: #308) to a mouthpiece (Fig. 1: #304, [0044]). (iii) The first aerosol precursor composition may comprise nicotine [0031], meeting the claim limitation of an aerosol forming agent. (iv) The second aerosol precursor composition may comprise a flavoring composition [0031]. With regard to Claim 3, Bless teaches wherein any of the aerosol precursor compositions may include a combination of nicotine and artificial flavors [0031-0032]. PNG media_image5.png 336 342 media_image5.png Greyscale With regard to Claim 4, Bless teaches wherein the two or more chambers (Fig. 2: #318A-C) each having an aerosol precursor composition [0032] which are heated by a singular heating element [0033] to promote on-demand delivery of desired aerosol [0004]. PNG media_image4.png 332 441 media_image4.png Greyscale With regard to Claim 5, Bless teaches wherein a flow tube (Fig. 1: #340), is formed within the cartridge (Fig. 1: #300), to direct aerosol from the aerosol forming arrangement (Fig. 1: #308) to a mouthpiece (Fig. 1: #304, [0044]). One of ordinary skill in the art would find it obvious that as both aerosol precursor compositions are directed to the same heating element and airflow path, the aerosol generated by the two would mix before being supplied to a user. Bless teaches all the limitations of the claims as set forth above, however Bless is silent to: The vaporizing element includes a first vaporizing element configured to vaporize the first liquid composition to generate a first aerosol, and a second vaporizing element configured to vaporize the second liquid composition toe generate a second aerosol PNG media_image3.png 696 455 media_image3.png Greyscale Hermiz teaches two separate liquid compositions that are delivered to separate heating elements (Fig. 10: #136 & #138) to generate aerosol [29]. One of ordinary skill in the art would find it obvious to combine the transfer paths of Hermiz with Bless to improve isolated and independent delivery of different liquid compositions while maintaining adjustable flow control [2]. Therefore, before the effective filing date of the claimed invention, it would have been obvious for one of ordinary skill in the art to modify the first and second liquid reservoir of Bless to wherein the vaporizing element includes a first vaporizing element configured to vaporize the first liquid composition to generate a first aerosol, and a second vaporizing element configured to vaporize the second liquid composition toe generate a second aerosol because both Bless and Hermiz are directed to allowing a user to select from multiple aerosol generating liquids based on preference. Hermiz teaches first and second liquid compositions with separate heating elements to improve isolated and independent delivery of different liquid compositions while maintaining adjustable flow control [2] and this merely involves applying a known separate heating configuration to a known aerosol generation device, ready for improvement, to yield predictable results. With regard to Claim 8, Bruton teaches wherein (i) the atomization unit contains a first heating element in the first cartomizer for vaporization and a second heating element in the second cartomizer for vaporization [0052]. Bruton further teaches (ii) control circuitry comprising a functional block for controlling the supply of power in the first and second cartomizers, comprising the liquid reservoirs, in response to user input [0052]. The control circuitry uses the supply of power to determine vaporization of liquid [0052]. PNG media_image6.png 187 391 media_image6.png Greyscale With regard to Claim 10, Bless, directed to a smoking article and cartridge, teaches (i) two rotatable discs (Fig. 5A: #338A and Fig. 5B: #338B), where the discs include ports corresponding to two or more chambers holding liquid to allow normal quantities of an aerosol precursor composition to be dispensed (Claim 4). (iii) The rotatable discs include multiple ports (Fig. 5A: #344A and #346, Fig. 5B: #344B). One of ordinary skill in the art would understand the composition delivered from the chambers is based on the rotation of the discs (Fig. 5A: #338A & Fig. 5B: #338B) and that blocking one chamber would result in an increase in quantity for another to help a consumer selectively control the quantity of an aerosol composition [0003]. Modified Bless teaches all of the limitations of the claims as set forth above, however modified Bless is silent to: Wherein the second rotary plate has a plurality of holes of different sizes Zhao, directed to an electronic cigarette atomizing device, teaches an air regulating component in the form of a disc with several through holes of different sizes [0056]. The Examiner acknowledges that the holes taught by Zhao are directed to regulating airflow, however, the principle of changing the size of an opening to change/regulate flow would still apply to a fluid like a liquid supply. One of ordinary skill in the art would understand that since airflow passes through the selected through hole, which are of a multitude of sizes, the size of the hole directly determines the area of the airflow path. Thus, it would have been obvious to modify the rotatable discs of Bless to include through holes of different sizes to provide adjustable flow regulation in the device [0056]. Therefore, before the effective filing date of the claimed invention, it would have been obvious for one of ordinary skill in the art to modify the second rotary plate of modified Bless to wherein the second rotary plate has a plurality of holes of different sizes because both Bless and Zhao are directed to altering flow based on user preferences. Zhao teaches a disc with different sized through holes to provide adjustable flow regulation [0056] and this merely involves combining known restricting elements according to known flow techniques ready for improvement to yield predictable results. PNG media_image1.png 177 370 media_image1.png Greyscale PNG media_image2.png 349 335 media_image2.png Greyscale With regard to Claim 11, Bless teaches (i) a smoking article comprising a cartridge (Fig. 2: #300) with two or more divided chambers (Fig. 2: #318A-C) comprising different aerosol precursor compositions [0032]. (ii) The liquid in the chambers (Fig. 2: #318A-C) are atomized by an aerosol forming arrangement, in the form of a heating element, for atomization [0034]. (iii) The smoking article further comprises two or more aligned discs (Fig. 5A: #338A & Fig. 5B: #338B), relating to the adjusting member of the claimed invention, that are rotatable such that based on the two discs alignment in communication with chambers (Fig. 2: #318A-C), the quantity of received aerosol precursor composition can be adjusted [0048]. (iv) One of ordinary skill in the art would understand the composition delivered from the chambers is based on the rotation of the discs (Fig. 5A: #338A & Fig. 5B: #338B) and that blocking one chamber would result in an increase in quantity for another to help a consumer selectively control the quantity of an aerosol composition [0003]. (v) The first disc (Fig. 5A: #338A) is aligned with liquid delivery path of the first chamber (Fig. 2: #320A, [0044]). wherein the first liquid composition and the second liquid composition are respectively delivered to the vaporizing element through a first transfer path and a second transfer path wherein the first rotary plate comprises a first hole and a second hole, a size of the first hole being different from a size of the second hole wherein the first rotary plate is configured to, by rotation, cause at least one of the first hole and the second hole to be placed on the first transfer path adjust the degree of opening of the first transfer path based on the size of the first hole and the size of the second hole PNG media_image3.png 696 455 media_image3.png Greyscale In regards to i., Hermiz, directed to an electronic smoking device, teaches (i) first and second reservoirs (Fig. 10: #122 & #14) comprising separate liquid compositions [33]. The liquid compositions are delivered separately to separate heating elements (Fig. 10: #136 & #138, [29]). One of ordinary skill in the art would find it obvious to combine the transfer paths of Hermiz with Bless to improve isolated and independent delivery of different liquid compositions while maintaining adjustable flow control [2]. Therefore, before the effective filing date of the claimed invention, it would have been obvious for one of ordinary skill in the art to modify the first and second liquid reservoir of Bless to wherein the first liquid composition and the second liquid composition are respectively delivered to the vaporizing element through a first transfer path and a second transfer path because both Bless and Hermiz are directed to allowing a user to select from multiple aerosol generating liquids based on preference. Hermiz teaches first and second reservoirs with separate flow paths before reaching a heating element to improve isolated and independent delivery of different liquid compositions while maintaining adjustable flow control [2] and this merely involves applying a known separate path configuration to a known aerosol generation device, ready for improvement, to yield predictable results. In regards to ii. and iii., Zhao, directed to an electronic cigarette atomizing device, teaches (ii) an air regulating component in the form of a disc with several through holes of different sizes to help regulate airflow [0056]. (iii) When the disc is rotated, the different sized through holes are connected to an inlet [0056]. The Examiner acknowledges that the holes taught by Zhao are directed to regulating airflow, however, the principle of changing the size of an opening to change/regulate flow would still apply to a fluid like a liquid supply. One of ordinary skill in the art would understand that since airflow passes through the selected through hole, which are of a multitude of sizes, the size of the hole directly determines the area of the airflow path. Thus, it would have been obvious to modify the rotatable discs of modified Bruton to include through holes of different sizes to provide adjustable flow regulation in the device [0056]. Therefore, before the effective filing date of the claimed invention, it would have been obvious for one of ordinary skill in the art to modify the rotary plate of Bless to wherein the first rotary plate comprises a first hole and a second hole, a size of the first hole being different from a size of the second hole and wherein the first rotary plate is configured to, by rotation, cause at least one of the first hole and the second hole to be placed on the first transfer path adjust the degree of opening of the first transfer path based on the size of the first hole and the size of the second hole because both Bless and Zhao are directed to altering flow based on user preferences. Zhao teaches a disc with different sized through holes to provide adjustable flow regulation [0056] and this merely involves combining known restricting elements according to known flow techniques ready for improvement to yield predictable results. Claim 6 is rejected under 35 U.S.C. 103 as being unpatentable over Bless (US 20180160732 A1), Hermiz (US 10721973 B1), and Zhao (CN 111671155 A, hereinafter citations referring to English Machine Translation), as applied to claim 1 above, and further in view of and Bruton (US 2021022400 A1) PNG media_image2.png 349 335 media_image2.png Greyscale With regard to Claim 6, Bless teaches a first chamber (Fig. 2: #318A) within a first cartridge (Fig. 2: #300) and all the limitations of the claims as set forth above, however modified Bless is silent to: The second liquid reservoir is included in a second cartridge The aerosol generation device further comprises a cartridge holder on which the first and second cartridge are mounted PNG media_image7.png 468 274 media_image7.png Greyscale Bruton, directed to an aerosol provisions system, teaches (i) two separate cartomizers (Fig. 2: #4a & #4b), each comprising a liquid reservoir (Fig. 2: #41a & #41b, [0076]) to ease replacement when one reservoir is depleted [0036]. (iii) The two cartomizers (Fig. 2: #4a and #4b) are held in two aerosol generating areas (Fig. 2: #24a and #24b) by two flow restriction members (Fig. 2: #25a and #25b), creating a holding or mounting structure, meeting the claim limitation of a cartridge holder. Therefore, before the effective filing date of the claimed invention, it would have been obvious for one of ordinary skill in the art to modify the reservoirs of modified Bless to wherein the second liquid reservoir is included in a second cartridge and the aerosol generation device further comprises a cartridge holder on which the first and second cartridge are mounted because both Bless and Bruton are directed to effective delivery of aerosol in a smoking device comprising multiple liquid compositions. Bruton teaches two liquid reservoirs in separate cartridges and a cartridge holder to ease replacement of the cartridge and lower the risk of undesirable tastes for a user [0036] and this merely involves combining prior art elements according to known multiple aerosol generating methods to yield predictable results. Claim 7 is rejected under 35 U.S.C. 103 as being unpatentable over Bless (US 20180160732 A1), Hermiz (US 10721973 B1), and Zhao (CN 111671155 A, hereinafter citations referring to English Machine Translation), as applied to claim 1 above, and further in view of and Li (US 20220248764 A1). With regard to Claim 7, modified Bless teaches all the limitations of the claims as set forth above, however modified Bless is silent to: Wherein the degree of vaporization of the first liquid composition and the degree of vaporization of the second liquid composition is adjusted based on a user input Li teaches wherein when a user inhales, the on-off valve moves to allow the blocking portion to open the liquid guiding passage [0037] leading to the channels of the two liquid storage cavities and keep the liquid distributed uniformly [0028]. Therefore, before the effective filing date of the claimed invention, it would have been obvious for one of ordinary skill in the art to modify the degrees of vaporization of the first and second liquid composition of modified Bruton to be adjusted based on a user input because both Bless and Li are directed to multiple liquid storage compartments. Li teaches an on-off valve that opens and closes the path from two liquid storage cavities to an atomizing core to keep the liquid distributed uniformly in the atomizing core and prevent the atomizing core from producing a burnt smell [0028] and this merely involves applying a known liquid control strategy to a known aerosol generating device ready for improvement to yield predictable results. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to OLUWATOSIN O DIYAN whose telephone number is (571)270-0789. The examiner can normally be reached Monday-Thursday 8:30 am - 6 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, Philip Louie can be reached at 571-270-1241. 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. /O.O.D./Examiner, Art Unit 1755 /PHILIP Y LOUIE/Supervisory Patent Examiner, Art Unit 1755
Read full office action

Prosecution Timeline

Dec 08, 2022
Application Filed
Mar 25, 2025
Non-Final Rejection — §103
Jun 24, 2025
Response after Non-Final Action
Jun 24, 2025
Response Filed
Aug 06, 2025
Response Filed
Oct 02, 2025
Final Rejection — §103
Nov 25, 2025
Response after Non-Final Action
Jan 05, 2026
Request for Continued Examination
Jan 07, 2026
Response after Non-Final Action
Feb 17, 2026
Non-Final Rejection — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12599166
SMOKING PIPES
2y 5m to grant Granted Apr 14, 2026
Patent 12501934
Cartridge for Vaporizer Device
2y 5m to grant Granted Dec 23, 2025
Patent 12396484
AEROSOL-GENERATING ARTICLE WITH A MULTI-COMPARTMENT LIQUID RESERVOIR
2y 5m to grant Granted Aug 26, 2025
Patent 12344428
AN APPARATUS AND A METHOD FOR MANUFACTURING A POUCHED PRODUCT FOR ORAL USE AND A POUCHED PRODUCT FOR ORAL USE
2y 5m to grant Granted Jul 01, 2025
Study what changed to get past this examiner. Based on 4 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
20%
Grant Probability
99%
With Interview (+100.0%)
3y 1m
Median Time to Grant
High
PTA Risk
Based on 5 resolved cases by this examiner. Grant probability derived from career allow rate.

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