Prosecution Insights
Last updated: August 14, 2026
Application No. 18/580,073

METHOD FOR MANUFACTURING TOBACCO GRANULES, AND AEROSOL GENERATING ARTICLE INCLUDING TOBACCO GRANULES MANUFACTURED THEREBY

Non-Final OA §103
Filed
Jan 17, 2024
Priority
Aug 23, 2022 — RE 10-2022-0105773 +1 more
Examiner
MARTIN, JOHN MITCHELL
Art Unit
Tech Center
Assignee
KT&G Corporation
OA Round
1 (Non-Final)
21%
Grant Probability
At Risk
1-2
OA Rounds
9m
Est. Remaining
25%
With Interview

Examiner Intelligence

Grants only 21% of cases
21%
Career Allowance Rate
11 granted / 53 resolved
-39.2% vs TC avg
Minimal +4% lift
Without
With
+4.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
46 currently pending
Career history
111
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
68.1%
+28.1% vs TC avg
§102
15.8%
-24.2% vs TC avg
§112
15.6%
-24.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 53 resolved cases

Office Action

§103
CTNF 18/580,073 CTNF 98649 DETAILED ACTION Notice of Pre-AIA or AIA Status 07-03-aia AIA 15-10-aia 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 1-13 are pending and are subject to this Office Action. This is the first Office Action on the merits of the claims. Claim Rejections - 35 USC § 103 07-06 AIA 15-10-15 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 07-20-aia AIA 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. 07-23-aia AIA 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. 07-20-02-aia AIA This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. 07-21-aia AIA Claim s 1-2, 4-6, and 8-13 are rejected under 35 U.S.C. 103 as being unpatentable over Koide (US 2024/0260639 A1) as applied to Claim 1, in view of Xu (US 2024/0358066 A1) . Regarding Claim 1-2, and 9-12, Koide, directed to methods for processing tobacco material ([0001]) and heat-not-burn articles ([0002]), teaches a method of manufacturing tobacco granules ([0039], The tobacco granules may be formed by any method and, for example, can be prepared as follows: fine powdered tobacco, nicotine, a flavor-developing aid, and a binder, are mixed together, water is added to the mixture, which is then kneaded, the resulting kneaded product is granulated to form granules), the method comprising: manufacturing ground tobacco by grinding raw tobacco ([0039], The tobacco granules can be prepared as follows: fine powdered tobacco. [0026], the composition containing aged tobacco leaves that have been ground to have a predetermined particle size (such materials are hereinafter also referred to as “fine powdered tobacco”). The fine powdered tobacco is a form of processed tobacco leaves); manufacturing a mixture including the ground tobacco and a solvent ([0039], The tobacco granules may be formed by any method and, for example, can be prepared as follows: fine powdered tobacco, nicotine, a flavor-developing aid, and a binder, plus, if desired, an aerosol-source material and a flavoring agent, are mixed together, water (solvent) is added to the mixture); manufacturing tobacco granules by using the mixture ([0039], The tobacco granules may be formed by any method and, for example, can be prepared as follows: fine powdered tobacco, nicotine, a flavor-developing aid, and a binder, plus, if desired, an aerosol-source material and a flavoring agent, are mixed together, water is added to the mixture, which is then kneaded, the resulting kneaded product is granulated to form granules); and drying the tobacco granules ([0041], The tobacco granules resulting from the extrusion-granulation may further be dried to adjust the water content, if necessary), but does not teach the method comprising freeze-drying the tobacco granules, wherein the ground tobacco has a diameter of 10 µm to 100 µm, wherein the freeze-drying is performed at a temperature of -15 °C to -120 °C, wherein the freeze-drying is performed in a vacuum, wherein a moisture content of the tobacco granules after the freeze-drying is 3 wt% to 10 wt% of the tobacco granules, wherein a porosity of the tobacco granules after the freeze-drying is 10 % to 70 %. Xu, directed to methods for processing tobacco material ([0001]), teaches a method of manufacturing an aerosol generating material ([0025]-[0029], The present disclosure provides a manufacturing method for a heat-not-burn aerosol generating substrate. The manufacturing method includes the following steps: providing raw material components for manufacturing the heat-not-burn aerosol generating substrate; making the raw material components into a paste-like material; molding the paste-like material through a molding process; and evaporating moisture of the paste-like material through a drying process), the method comprising: manufacturing ground tobacco by grinding raw tobacco ([0025]-[0029], The manufacturing method includes the following steps: providing raw material components include plant raw material. [0135], The plant raw material may be an herbal plant, a Chinese herbal plant, a tobacco plant. [0032]-[0033], The manufacturing method further includes conducting pretreatment on the raw material components. the pretreatment includes crushing the raw material components through a crusher. A crushing granule size is 10 μm-500 μm); manufacturing a tobacco mixture including the ground tobacco and a solvent ([0025]-[0029], The manufacturing method includes the following steps: providing raw material components; making the raw material components into a paste-like material. [0030], the raw material components include a plant raw material (tobacco plant) and water (solvent)); molding the tobacco mixture ([0025]-[0029], The manufacturing method includes the following steps: providing raw material components; making the raw material components into a paste-like material; molding the paste-like material through a molding process); and freeze-drying the molded tobacco mixture ([0025]-[0029], The manufacturing method includes the following steps: providing raw material components; making the raw material components into a paste-like material; molding the paste-like material through a molding process; and evaporating moisture of the paste-like material through a drying process. the drying process includes freeze-drying the extruded paste-like material in vacuum); wherein the ground tobacco has a diameter of 10 µm to 100 µm ([0032]-[0033], [0135], The manufacturing method further includes conducting pretreatment on the raw material components (including tobacco plant material). The pretreatment includes crushing the raw material components through a crusher. A crushing granule size is 10 μm-500 μm. [0040], the drying process includes freeze-drying the extruded paste-like material in vacuum), wherein the freeze-drying is performed at a temperature of -15 °C to -120 °C ([0275]-[0278], Fig. 24 is a schematic structural diagram of a drying device 828 for an aerosol generating substrate 30. The drying device 828 for the aerosol generating substrate uses a freeze-drying method. Drying device 828 operates at a temperature of -80 °C to 45 °C), wherein the freeze-drying is performed in a vacuum ([0040], the drying process includes freeze-drying the extruded paste-like material in vacuum), wherein a moisture content of the molded tobacco mixture after the freeze-drying is 3 wt% to 10 wt% of the tobacco granules ([0230], [0242], Moisture is dried to 5%-15% of a weight of the aerosol generating substrate), wherein a porosity of the molded tobacco mixture after the freeze-drying is 10 % to 70 % ([0257], [0327]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to freeze dry the tobacco granules wherein the freeze-drying is performed at a temperature of -15 °C to -120 °C in a vacuum as taught by Xu because Koide and Xu are directed to methods for processing tobacco material, Xu demonstrates that freeze drying a tobacco and water mixture at a temperature as low as -80 °C generates a substrate having a porosity sufficient for air to effectively pass through the tobacco substrate and/or a porosity sufficient for liquid aerosol generating materials to permeate through the substrate (Xu, [0132], [0276]-[0278], [0327]), Xu demonstrates that freeze drying in a vacuum allows the frozen water to sublimate into vapor to escape in a proper vacuum environment (Xu, [0276]), and this involves combining prior art elements to yield predictable results. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to provide the method of Koide wherein the ground tobacco has a diameter of 10 µm to 100 µm as taught by Xu because Koide and Xu are directed to methods for processing tobacco material, Koide does not provide a diameter for the ground tobacco (Koide, [0039]), Xu demonstrates that ground tobacco having a diameter of 10 µm to 100 µm is a suitable starting material for a tobacco manufacturing process (Xu, [0033]), and one of ordinary skill in the art would have been motivated by the disclosure in Xu to provide the ground tobacco having the claimed diameter. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to provide the method of Koide wherein a moisture content of the tobacco granules after the freeze-drying is 3 wt% to 10 wt% of the tobacco granules as taught by Xu because Koide and Xu are directed to methods for processing tobacco material, Xu demonstrates that a tobacco substrate having a low moisture content of 5 wt% to 15 wt% ensures that the moisture content and temperature of its aerosol is low such that a mouth of the smoker is not burnt (Xu, [0061], [0283]), and one of ordinary skill in the art would have been motivated by the disclosure in Xu to provide the tobacco granules having the claimed moisture content. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to provide the method of Koide wherein a porosity of the tobacco granules after the freeze-drying is 10 % to 70 % as taught by Xu because Koide and Xu are directed to methods for processing tobacco material, Xu demonstrates that a tobacco substrate having porosity of 10% and 70% allows for air to effectively pass through the tobacco substrate and/or allows for liquid aerosol generating materials to permeate through the substrate (Xu, [0132], [0327]), and one of ordinary skill in the art would have been motivated by the disclosure in Xu to provide the tobacco granules having the claimed moisture content. Regarding Claim 4, Koide in view of Xu teaches the method of claim 1. Koide further teaches the method wherein the solvent includes at least one selected from water and alcohols having 1 to 4 carbon atoms ([0039], Water is the solvent). Regarding Claim 5, Koide in view of Xu teaches the method of claim 1. Koide further teaches the method wherein the solvent includes water and an alcohol having 1 to 4 carbon atoms, in a volume ratio of about 10:0 to about 5:5 ([0039], Water is the solvent. If water is used as the sole component of the solvent, the solvent necessarily comprises water and an alcohol having 1 to 4 carbon atoms in a volume ratio of 10:0). Regarding Claim 6, Koide in view of Xu teaches the method of claim 1. Koide further teaches the method wherein the manufacturing of the tobacco granules includes wet-extruding the mixture ([0039], The tobacco granules may be formed by any method and, for example, can be prepared as follows: fine powdered tobacco, nicotine, a flavor-developing aid, and a binder, plus, if desired, an aerosol-source material and a flavoring agent, are mixed together, water is added to the mixture, which is then kneaded, the resulting kneaded product is granulated to form granules (having a long columnar shape) in a wet extrusion-granulation machine). Regarding Claim 8, Koide in view of Xu teaches the method of claim 1. Koide further teaches the method wherein the tobacco granules have a diameter of 0.5 mm to 1.5 mm ([0044], the granules may have a particle size of, without limitation, greater than or equal to 250 μm (0.25 mm). The particle size is more preferably 250 to 850 μm (0.25-0.85 mm)). Regarding Claim 13, Koide teaches the aerosol generating article comprising tobacco granules manufactured according to the method of claim 1 ([0037-[0039], The material for a flavor inhalation article may be provided, without limitation, in the form of granules or a sheet (tobacco granules or a tobacco sheet)) . 07-21-aia AIA Claim 3 is rejected under 35 U.S.C. 103 as being unpatentable over Koide (US 2024/0260639 A1) in view of Xu (US 2024/0358066 A1) as applied to Claim 1, and further in view of Granzotto (US 2022/0030927 A1) . Regarding Claim 3, Koide in view of Xu teaches the method of claim 1, but does not teach the method wherein the manufacturing of the ground tobacco is performed at a temperature of -15 °C to -120 °C. Granzotto, directed to methods of processing tobacco ([0001]), teaches a method of manufacturing ground tobacco ([0052]-[0057], Fig. 5; Cryogenic mill 20 is configured to grind tobacco material to a particle size of about 20-220 μm), wherein the manufacturing of the ground tobacco is performed at a temperature of -15 °C to -120 °C ([0052]-[0057], Fig. 5; Within cryogenic mill 20, liquid nitrogen at a temperature of −175° C is injected onto the product inside the chamber of a screw conveyor 68 which feeds the mill 20 and its residence time in contact with nitrogen is about 2 to 5 sec. which is also the transit time of the product inside the cochlea that feeds the pin mill. The temperature of the product coming out of the mill 20 is advantageously less than 10° C. There must be embodiments of the invention wherein the average temperature of the tobacco product coming out of the mill is between -15 °C to -120 °C. The average temperature can be modified by the contact duration and the relative amounts of liquid nitrogen and tobacco within the mill 20). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to provide the method of Koide in view of Xu wherein the manufacturing of the ground tobacco is performed at a temperature of -15 °C to -120 °C as taught by Granzotto because Koide, Xu, and Granzotto are directed to methods of processing tobacco, Granzotto demonstrates that cryogenic grinding allows the tobacco to be kept at low process temperatures and therefore to retain tobacco aromas (Granzotto, [0053]), and this involves combining prior art elements to yield predictable results . 07-21-aia AIA Claim 7 is rejected under 35 U.S.C. 103 as being unpatentable over Koide (US 2024/0260639 A1) in view of Xu (US 2024/0358066 A1) as applied to Claim 1, and further in view of Cao (US 2020/0383375 A1) . Regarding Claim 7, Koide in view of Xu teaches the method of claim 1, but does not teach the method wherein the manufacturing of the tobacco granules includes spraying the mixture in a fluidized-bed reactor. Cao, directed to heat-not-burn articles ([0002]-[0003]), teaches a method of manufacturing of hemp granules ([0039], A hemp composition may be granulated by a spray fluidized bed granulation process), wherein the manufacturing of the hemp granules includes spraying the mixture in a fluidized-bed reactor ([0039], A hemp composition may be granulated by a spray fluidized bed granulation process). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to provide the method of Koide in view of Xu wherein the manufacturing of the tobacco granules includes spraying the mixture in a fluidized-bed reactor as taught by Cao because Koide and Cao are directed to heat-not-burn articles, Cao demonstrates that spray fluidizing bed granulation is a common alternative granulation method (Cao, [0039]), and this involves combining prior art elements to yield predictable results. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JOHN M. MARTIN whose telephone number is (703)756-1270. The examiner can normally be reached M-F 8:00-5:00. 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 on (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. /J.M.M./ Examiner, Art Unit 1755 /PHILIP Y LOUIE/Supervisory Patent Examiner, Art Unit 1755 Application/Control Number: 18/580,073 Page 2 Art Unit: 1755 Application/Control Number: 18/580,073 Page 3 Art Unit: 1755 Application/Control Number: 18/580,073 Page 4 Art Unit: 1755 Application/Control Number: 18/580,073 Page 5 Art Unit: 1755 Application/Control Number: 18/580,073 Page 6 Art Unit: 1755 Application/Control Number: 18/580,073 Page 7 Art Unit: 1755 Application/Control Number: 18/580,073 Page 8 Art Unit: 1755 Application/Control Number: 18/580,073 Page 9 Art Unit: 1755 Application/Control Number: 18/580,073 Page 10 Art Unit: 1755 Application/Control Number: 18/580,073 Page 11 Art Unit: 1755
Read full office action

Prosecution Timeline

Jan 17, 2024
Application Filed
May 04, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12635730
Aerosol Generating Device
4y 2m to grant Granted May 26, 2026
Patent 12628867
AEROSOL GENERATING DEVICE AND METHOD OF OPERATING THE SAME
4y 1m to grant Granted May 19, 2026
Patent 12495828
AEROSOL-GENERATING DEVICE WITH MOVABLE PORTIONS
3y 6m to grant Granted Dec 16, 2025
Patent 12471627
AEROSOL-GENERATING DEVICE WITH MOVABLY ATTACHED MOUTHPIECE
4y 0m to grant Granted Nov 18, 2025
Patent 12396483
AEROSOL-GENERATING DEVICE WITH SENSORIAL MEDIA CARTRIDGE
3y 1m to grant Granted Aug 26, 2025
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
21%
Grant Probability
25%
With Interview (+4.1%)
3y 4m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 53 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month