CN110946316A - Method for treating non-burning tobacco shreds by heating - Google Patents
Method for treating non-burning tobacco shreds by heating Download PDFInfo
- Publication number
- CN110946316A CN110946316A CN201811130965.7A CN201811130965A CN110946316A CN 110946316 A CN110946316 A CN 110946316A CN 201811130965 A CN201811130965 A CN 201811130965A CN 110946316 A CN110946316 A CN 110946316A
- Authority
- CN
- China
- Prior art keywords
- tobacco
- tobacco shreds
- temperature
- shreds
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000208125 Nicotiana Species 0.000 title claims abstract description 107
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 107
- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 239000011261 inert gas Substances 0.000 claims abstract description 6
- 230000035484 reaction time Effects 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 239000000796 flavoring agent Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 239000000779 smoke Substances 0.000 abstract description 32
- 239000003205 fragrance Substances 0.000 abstract description 28
- 235000009508 confectionery Nutrition 0.000 abstract description 8
- 206010013911 Dysgeusia Diseases 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 230000001953 sensory effect Effects 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 7
- 235000019505 tobacco product Nutrition 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 238000003763 carbonization Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000002470 solid-phase micro-extraction Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 235000019634 flavors Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Tobacco Products (AREA)
Abstract
The invention provides a method for treating tobacco shreds of cigarettes without burning by heating, which comprises the following steps: the method comprises the steps of putting tobacco shreds into a reaction kettle, carrying out high-pressure low-temperature reaction under the protection of inert gas, wherein the high-pressure low-temperature condition is 1.0-2.0 MPa, the temperature is 110-180 ℃, the reaction time is 0.5-5 h, and after the reaction is finished, the moisture of the tobacco shreds obtained after air release and circulating water cooling is 3.5-5%. The invention adopts high-pressure low-temperature reaction to treat the tobacco shreds, the moisture of the tobacco shreds is reduced to 3.5-5% from the original 12%, and the tobacco shreds are obviously increased in smoke gas amount, moderate in smoke gas temperature, rich in tobacco fragrance, increased in tobacco original fragrance, obvious in burnt sweet fragrance, clean and comfortable in aftertaste and capable of meeting the requirement of non-combustible heating for burning the tobacco shreds.
Description
Technical Field
The invention belongs to the field of heating non-combustion, and particularly relates to a method for treating tobacco shreds without heating non-combustion.
Background
Compared with the traditional cigarette, the heating non-combustion cigarette has higher requirement on the moisture of tobacco shreds, and the cigarette made of the treated traditional cigarette tobacco shreds has small smoke volume, high moisture content and hot smoke under the heating non-combustion smoking mode, and cannot meet the sensory requirement of the heating non-combustion cigarette. In order to avoid the problems of excessive moisture, sample rolling and the like of the existing commercial cigarette body which is not combusted by heating, for example, reconstituted tobacco preparation is carried out, and tobacco shreds serving as the cigarette body are often too high in moisture and small in smoke amount, so that the added smoke agent content is high, and the problems of difficult rolling, smoke scalding and the like are caused; for example, the tobacco sheet is used for preparation, the added glycerin is about 20%, and the tobacco fragrance and the scorched fragrance are insufficient. Several disadvantages with shredded tobacco: too high moisture, low smoke, large amount of smoke to be added, causing difficulty in rolling.
Disclosure of Invention
The invention provides a method for processing non-burning tobacco shreds by heating, which comprises the following steps: the method comprises the steps of putting tobacco shreds into a reaction kettle, carrying out high-pressure low-temperature reaction under the protection of inert gas, wherein the high-pressure low-temperature condition is 1.0-2.0 MPa, the temperature is 110-170 ℃, the reaction time is 0.5-5 h, and after the reaction is finished, the moisture of the tobacco shreds obtained after air release and circulating water cooling is 3.5-5%.
In some preferred embodiments of the invention, the inert condition is nitrogen or argon.
In other preferable embodiments of the invention, the moisture content of the cut tobacco before being filled into the reaction kettle is 8-10%, the moisture content of the cut tobacco filled into the reaction kettle is 8-10%, and the moisture content of the cut tobacco obtained after air release and circulating water cooling is 3.5-5%.
In other preferred embodiments of the present invention, the cut tobacco is one or a mixture of flue-cured tobacco, aromatic tobacco, sun-cured tobacco, burley tobacco, medium-flavor tobacco, strong-flavor tobacco and fen-flavor tobacco.
In some specific embodiments of the invention, the temperature of the reaction kettle is 110-130 ℃; in other specific embodiments of the present invention, the reaction time of the tobacco shred in the reaction kettle is 1 h; in other specific embodiments of the invention, the elevated pressure is 1.5MPa of nitrogen.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the tobacco shreds are treated by adopting high-pressure low-temperature reaction, the moisture of the tobacco shreds is reduced to 3.5-5% from the original 8-10%, and through sensory evaluation of non-combustion after heating, the smoke gas quantity is obviously increased, the smoke gas temperature is moderate, the tobacco fragrance is rich, the tobacco fragrance is increased, the sweet aroma is obvious, the aftertaste is clean and comfortable, and the requirement of non-combustion and non-combustion of the tobacco shreds during heating is met.
2. Under the environment of high pressure and temperature of over 100 ℃ and below 170 ℃, the combined water and the free water can be effectively removed, the carbonization phenomenon can not occur, the water content is reduced to 3.5-5% from the original 8-10%, the smoke temperature during suction is effectively reduced, and the hair scald feeling is reduced; through sensory evaluation of non-combustion during heating, the smoke volume is obviously increased, the smoke temperature is moderate, the tobacco fragrance is rich, the tobacco fragrance is increased, the sweet fragrance is obvious, the aftertaste is clean and comfortable, and the requirement of non-combustion during heating on tobacco shreds is met.
3. The added smoke agent is greatly reduced in the tobacco shreds processed by the method when the tobacco shreds are used for preparing heating non-combustible tobacco products, the addition amount of the smoke agent is below 10 percent, and the tobacco shreds can be rolled by a conventional cigarette making machine, namely, the industrial production is realized on the existing mechanical scale, and the resource waste is avoided.
4. The addition of the inert gas can effectively prevent the tobacco shreds from being excessively oxidized at a relatively high temperature, keep the semi-degradation state of the tobacco shreds similar to coke and not coke, obviously increase the herbal fragrance and the scorched fragrance of the tobacco when the tobacco shreds are smoked under the heating and non-burning state, and avoid the generation of scorched flavor caused by excessive carbonization of the tobacco.
5. According to the spectrum provided by the invention, the tobacco treated by the treatment method provided by the invention is degraded, the fragrance components are richer, substances such as heterocyclic compounds, phenols and esters are greatly increased, and the original fragrance and the burnt sweet fragrance of the tobacco are effectively increased.
Drawings
FIG. 1 is a solid phase microextraction analysis chart of tobacco shreds before treatment;
FIG. 2 is a solid phase microextraction analysis chart of the processed tobacco shreds.
Detailed Description
Example 1
Weighing 800g of flue-cured tobacco shreds, controlling the moisture content to be about 8%, uniformly mixing, adding into a 10L reaction kettle, adding nitrogen, reacting for 1h after heating to the set temperature under the high pressure of 1.5MPa and the set temperature of 130 ℃, cooling after the reaction is finished, taking out, and obtaining the tobacco shreds suitable for heating the non-combustible tobacco products, wherein the moisture content of the tobacco shreds is 4.6%.
The tobacco shred has 4.6 percent of water, and has large smoke concentration, moderate smoke temperature, rich smoke fragrance, sufficient tobacco fragrance, obvious sweet and fragrant smell and clean and comfortable aftertaste after sensory evaluation.
Example 2
Weighing 800g of flue-cured tobacco shreds, controlling the moisture content to be about 8.5%, uniformly mixing, adding into a 10L reaction kettle, adding nitrogen under the high pressure of 1MPa, setting the temperature to be 120 ℃, heating to the setting temperature, reacting for 2 hours, cooling after the reaction is finished, taking out, and obtaining the tobacco shreds suitable for heating non-combustion tobacco products, wherein the moisture content of the tobacco shreds is 5%.
Through sensory evaluation, the smoke concentration is high, the smoke temperature is moderate, the smoke fragrance is rich, the herbal fragrance of the smoke is sufficient, the sweet fragrance is obvious, and the aftertaste is clean and comfortable.
Example 3
Weighing 800g of flue-cured tobacco shreds, controlling the moisture content to be about 9%, uniformly mixing, adding into a 10L reaction kettle, adding nitrogen, adding under the high pressure of 2MPa, setting the temperature to be 140 ℃, heating to the set temperature, reacting for 5h, cooling after the reaction is finished, taking out, and obtaining the tobacco shreds suitable for heating non-combustion tobacco products, wherein the moisture content of the tobacco shreds is 4%.
Through sensory evaluation, the smoke concentration is high, the smoke temperature is moderate, the smoke fragrance is rich, the herbal fragrance of the smoke is sufficient, the sweet fragrance is obvious, and the aftertaste is clean and comfortable.
Example 4
Weighing 800g of flue-cured tobacco shreds, controlling the moisture content to be about 10%, uniformly mixing, adding into a 10L reaction kettle, adding nitrogen under the high pressure of 1MPa, setting the temperature to be 170 ℃, heating to the setting temperature, reacting for 0.5h, cooling after the reaction is finished, taking out, and obtaining the tobacco shreds suitable for heating non-combustion tobacco products, wherein the moisture content of the tobacco shreds is 3.5%. Through sensory evaluation, the smoke concentration is high, the smoke temperature is moderate, the smoke fragrance is rich, the herbal fragrance of the smoke is sufficient, the sweet fragrance is obvious, and the aftertaste is clean and comfortable.
Comparative example 1
Comparative example 1 was treated in substantially the same manner as in example 1, with the only difference being that the set temperature was 200 ℃.
Comparative example 2
Comparative example 2 was treated in substantially the same manner as in example 1, except that the inert gas nitrogen did not participate in the entire treatment process.
Comparative example 3
Weighing 800g of flue-cured tobacco shreds, humidifying the tobacco shreds until the moisture content is 15%, uniformly mixing, adding the mixture into a 10L reaction kettle, and heating for 2 hours at 180 ℃. After the heating, the tobacco material is taken out to obtain a tobacco material suitable for heating a non-combustion tobacco product.
Test example 1
The cut tobacco before and after being processed in the embodiment 1 is respectively subjected to headspace analysis and solid phase microextraction analysis, the analysis spectrum of the cut tobacco before being processed is shown in figure 1, and the analysis spectrum of the cut tobacco after being processed is shown in figure 2, so that the following can be obviously seen: the number of aroma components of the tobacco shreds is increased; the content is improved, and the requirement of a formula which is not burnt during heating is met; and further research shows that: under the environment of high pressure and the temperature of over 100 ℃ and below 170 ℃, the combined water and the free water can be effectively removed, the phenomenon of excessive carbonization can not occur, the water content is reduced from the original 8-10% to 3.5-5%, the smoke temperature during suction is effectively reduced, and the hair scald feeling is reduced.
Test example 2
Comparing the tobacco shreds obtained in the examples 1 to 4 with the tobacco shreds obtained by the method in the comparative example 1, the comparative example 1 adopts the high temperature of more than 200 ℃, the temperature of the comparative example is higher, the main purpose is to degrade the added compound, the tobacco is carbonized, the scorched flavor is obvious, the examples 1 to 4 mainly aim to degrade the fragrance components of the tobacco, and the high-pressure low-temperature method is adopted, so that the tobacco fibers are not carbonized even if the fragrance components of the tobacco are degraded, and the semi-degraded state of the tobacco shreds is achieved.
The tobacco obtained in the examples 1-4 and the tobacco obtained in the comparative example 2 are prepared into a cigarette which is not burnt under heating for comparison, and the comparative example 2 lacks the protection of inert gas, generates strong oxidation reaction and seriously affects the sensory evaluation.
Comparing the tobacco shreds of the cigarette obtained in the examples 1 to 4 with the tobacco shreds of the cigarette obtained in the comparative example 3, the test method in the comparative example 3 is to age and absorb the tobacco shreds, and meanwhile, in order to prevent coking, the initial moisture content of the tobacco shreds is as high as 15% or even 20%.
Claims (6)
1. A method for processing non-burning tobacco shreds by heating is characterized in that: the method comprises the following steps: and (3) putting the tobacco shreds into a reaction kettle, then carrying out high-pressure low-temperature reaction under the protection of inert gas, wherein the high-pressure low-temperature condition is 1.0-2.0 MPa, the temperature is 110-170 ℃, the reaction time is 0.5-5 h, and after the reaction is finished, air is released, and circulating water is cooled to obtain the tobacco shreds.
2. The method for processing the cut tobacco of the cigarette without burning by heating according to claim 1, characterized in that: the inert condition is nitrogen or argon.
3. The method for processing tobacco shreds without burning by heat according to claim 1, wherein: the water content of the tobacco shreds filled into the reaction kettle is 8-10%, and the water content of the tobacco shreds obtained after air release and circulating water cooling is 3.5-5%.
4. The method for processing tobacco shreds without burning by heat according to claim 1, wherein: the tobacco shred is one or more of flue-cured tobacco shred, aromatic tobacco shred, sun-cured yellow tobacco shred, burley tobacco shred, middle-flavor tobacco shred, strong-flavor tobacco shred, and fragrant-flavor tobacco shred.
5. The method for processing tobacco shreds without burning by heat according to claim 1, wherein: the temperature of the reaction kettle is 110-130 ℃.
6. The method for processing tobacco shreds without burning by heat according to claim 1, wherein: the reaction time was 1 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811130965.7A CN110946316A (en) | 2018-09-27 | 2018-09-27 | Method for treating non-burning tobacco shreds by heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811130965.7A CN110946316A (en) | 2018-09-27 | 2018-09-27 | Method for treating non-burning tobacco shreds by heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110946316A true CN110946316A (en) | 2020-04-03 |
Family
ID=69967981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811130965.7A Pending CN110946316A (en) | 2018-09-27 | 2018-09-27 | Method for treating non-burning tobacco shreds by heating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110946316A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114209086A (en) * | 2021-12-19 | 2022-03-22 | 云南恒罡科技有限公司 | Rosa roxburghii extract, preparation method and application thereof, and low-temperature heating non-combustible product |
| CN114209085A (en) * | 2021-12-19 | 2022-03-22 | 云南恒罡科技有限公司 | Tobacco extract, preparation method and application thereof, and low-temperature heating non-combustible product |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4986286A (en) * | 1989-05-02 | 1991-01-22 | R. J. Reynolds Tobacco Company | Tobacco treatment process |
| CA2400068A1 (en) * | 2000-02-14 | 2001-08-16 | Reemtsma Cigarettenfabriken Gmbh | Method for improving the filling ability of tobacco |
| CN103445283A (en) * | 2013-09-29 | 2013-12-18 | 中国烟草总公司郑州烟草研究院 | Processing method of tobacco raw materials for heating non-combustion tobacco products |
| CN105559133A (en) * | 2016-03-09 | 2016-05-11 | 江苏中烟工业有限责任公司 | Treatment method for heating cigarette core material of non-combustible cigarettes |
| CN105935151A (en) * | 2016-04-20 | 2016-09-14 | 江苏中烟工业有限责任公司 | Processing method suitable for low-temperature non-combustion cigarette tobacco |
| CN107319641A (en) * | 2017-07-21 | 2017-11-07 | 上海烟草集团有限责任公司 | A kind of tobacco fuming liquids for heating the tobacco product that do not burn and its production and use |
-
2018
- 2018-09-27 CN CN201811130965.7A patent/CN110946316A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4986286A (en) * | 1989-05-02 | 1991-01-22 | R. J. Reynolds Tobacco Company | Tobacco treatment process |
| CA2400068A1 (en) * | 2000-02-14 | 2001-08-16 | Reemtsma Cigarettenfabriken Gmbh | Method for improving the filling ability of tobacco |
| CN103445283A (en) * | 2013-09-29 | 2013-12-18 | 中国烟草总公司郑州烟草研究院 | Processing method of tobacco raw materials for heating non-combustion tobacco products |
| CN105559133A (en) * | 2016-03-09 | 2016-05-11 | 江苏中烟工业有限责任公司 | Treatment method for heating cigarette core material of non-combustible cigarettes |
| CN105935151A (en) * | 2016-04-20 | 2016-09-14 | 江苏中烟工业有限责任公司 | Processing method suitable for low-temperature non-combustion cigarette tobacco |
| CN107319641A (en) * | 2017-07-21 | 2017-11-07 | 上海烟草集团有限责任公司 | A kind of tobacco fuming liquids for heating the tobacco product that do not burn and its production and use |
Non-Patent Citations (2)
| Title |
|---|
| 丁瑞康等: "《卷烟工艺学》", 31 March 1958, 食品工业出版社 * |
| 张晓宇: "烤烟在惰性和含氧气氛中的热分析动力学研究", 《江苏农业科学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114209086A (en) * | 2021-12-19 | 2022-03-22 | 云南恒罡科技有限公司 | Rosa roxburghii extract, preparation method and application thereof, and low-temperature heating non-combustible product |
| CN114209085A (en) * | 2021-12-19 | 2022-03-22 | 云南恒罡科技有限公司 | Tobacco extract, preparation method and application thereof, and low-temperature heating non-combustible product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4244381A (en) | Upgraded tobacco stem material and its method of preparation | |
| US4366824A (en) | Process for expanding tobacco | |
| DE2931296C2 (en) | Process for making a reconstituted smokable material | |
| CN105559133B (en) | One kind heats cigarette cigarette core material processing method of not burning | |
| CN110771936B (en) | Tobacco shred and preparation method and application thereof | |
| CN111849632B (en) | Deep processing method of natural fragrant raw material for cigarettes and application of natural fragrant raw material in novel tobacco | |
| US3861401A (en) | Smokable tobacco substitute material and method | |
| CN102715632B (en) | Mixing process capable of reducing harmful components of burley tobacco | |
| CN106235415B (en) | Liquid of electronic cigarette with tobacco fragrance | |
| CN110946316A (en) | Method for treating non-burning tobacco shreds by heating | |
| CN108004023A (en) | Iris extract and its application in cigarette | |
| CN105686071A (en) | Method for treating tobacco raw material for heating non-burning cigarettes | |
| CN110236231B (en) | Preparation method of electronic cigarette oil combining microwave pyrolysis and molecular distillation | |
| CN102551189B (en) | Technology for treating expanded stems | |
| CN105707970A (en) | Preparation method of mixed type regenerated cut stems | |
| CN109275946B (en) | Dynamic extraction treatment method suitable for tobacco shreds in heating and non-burning state | |
| US20160007646A1 (en) | Method for preparing expanded tobacco stems | |
| CN110693071A (en) | Smoking substrate and method of making same | |
| CN108618188B (en) | Preparation method of microporous cut tobacco applicable to low-temperature cigarettes | |
| CN110720652A (en) | Preparation method and application of cut stems with high concentration | |
| CN113796563B (en) | Preparation method and application of coffee aroma type essence | |
| CN109275934A (en) | A kind of processing method suitable for heating pipe tobacco under not combustion state | |
| CN110522072B (en) | Preparation method of recombined stem shred core material for cigarette by heating and non-combustion | |
| CN109171003B (en) | Application of sodium phosphate buffer solution in reducing release amount of TSNAs (tobacco smoke ananas) in cigarette smoke | |
| CN110946305A (en) | Preparation method of non-combustible heated tobacco shreds |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200403 |
|
| RJ01 | Rejection of invention patent application after publication |