CN102266363A - Process for simultaneously extracting general flavone and total saponins from Chinese tamarisk twigs - Google Patents

Process for simultaneously extracting general flavone and total saponins from Chinese tamarisk twigs Download PDF

Info

Publication number
CN102266363A
CN102266363A CN2011102255603A CN201110225560A CN102266363A CN 102266363 A CN102266363 A CN 102266363A CN 2011102255603 A CN2011102255603 A CN 2011102255603A CN 201110225560 A CN201110225560 A CN 201110225560A CN 102266363 A CN102266363 A CN 102266363A
Authority
CN
China
Prior art keywords
ethanol
extracting
total saponins
resin
drying
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
Application number
CN2011102255603A
Other languages
Chinese (zh)
Inventor
刘东锋
郭琴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Zelang Medical Technology Co Ltd
Original Assignee
Nanjing Zelang Medical Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nanjing Zelang Medical Technology Co Ltd filed Critical Nanjing Zelang Medical Technology Co Ltd
Priority to CN2011102255603A priority Critical patent/CN102266363A/en
Publication of CN102266363A publication Critical patent/CN102266363A/en
Pending legal-status Critical Current

Links

Abstract

The invention belongs to the field of traditional Chinese medicines, and particularly relates to a process for simultaneously extracting general flavone and total saponins from Chinese tamarisk twigs. The process is characterized by comprising the following steps of: drying Chinese tamarisk twig serving as a raw material at a low temperature below 70 DEG C, smashing into coarse powder, performing hot reflux on the coarse powder with petroleum ether to remove oil-soluble substances such as chlorophyll and the like, volatizing and drying a solvent, adding a lower-alcohol organic solvent for extracting, filtering an extracting solution, recovering under reduced pressure, adding water into a concentrated solution to 0.5g crude medicament/ml, processing through combined macroporous absorption resin for saturated absorption, eluting with water, ammonia water, 20-50% ethanol and 60-80% ethanolin sequence, combining eluents of ammonia water and 20-50% ethanol, slowly adjusting the pH to 2-4, repeatedly washing precipitates with water, and drying to obtain the general flavone; adding medicinal active carbon into ethanol eluent of which the concentration is 60-80 percent, heating for refluxing, filtering in hot state, recovering ethanol from the filtrate under reduced pressure, concentrating and drying to obtain high-purity Chinese tamarisk twig total saponins of which the content is up to 80 percent. The process has the advantages of reasonable design, low cost and easiness for operation and mass production.

Description

Extract the technology of total flavones and total saponins in the Cacumen Tamaricis simultaneously
Technical field
The invention belongs to the field of Chinese medicines, be specifically related to extract simultaneously the technology of total flavones and total saponins in the Cacumen Tamaricis.
Background technology
Cacumen Tamaricis be suspend Tamarix Ramulus et Folium Tamaricis ( Tamarix chinensisLour.) dry young browse.Sweet in the mouth, suffering, flat, GUIXIN, lung, stomach warp.Diffusing wind is arranged, induce sweat, the effect of rash.Ramulus et Folium Tamaricis secretes salt-secreting gland structure because of its unique biological, most plant have drought resisting, the characteristic of salt tolerant alkali, water-fast wet, impoverishment tolerant, China Tamarix seeds mainly are distributed in northwest drought, semiarid zone and coastal saline-alkali area, North China.The main component of Cacumen Tamaricis comprises flavonoid, triterpenes and volatile oil, have protect the liver, pharmacologically active such as antiinflammatory, antitumor, antipyretic-antalgic.Wherein triterpenoid compound comprises tamarixone, Ramulus et Folium Tamaricis alcohol, lupeol, β-amyrin, ursolic acid etc., have and protect the liver, antiinflammatory, antibiotic, anti-tumor activity, analgesic, analgesia, mice carried out the decoct of lumbar injection Cacumen Tamaricis, can obvious inhibitory action be arranged the mouse cough symptom due to the ammonia spraying.Facts have proved that Cacumen Tamaricis is also better to simple property senile chronic bronchitis effect, the type of panting takes second place, it is relatively poor to merge emphysema person.Zhao Runzhou etc. show that by experiment the Cacumen Tamaricis decoct all can obviously reduce the Mice Auricle capillary permeability when middle and high dosage, and the Mus ear chemical inflammation of antagonism due to the dimethylbenzene do not have the antiinflammatory effect in low dose group.Very significantly antiinflammatory action all appears in middle and high dosage group, and has shown certain dose-effect relationship.Analgesic experiment is the result show, the Cacumen Tamaricis decoct has obvious analgesic activity during by the 50g/kg gastric infusion, and the 1h effect is the most obvious after administration.And in, low dose group do not observe obvious analgesic activity.When the Cacumen Tamaricis decoct is pressed 7.5g/kg filling stomach in addition, the artificial fever rabbit also there is certain antipyretic effect.
At present, in the extracting method of the total flavones colleague report is arranged also in the Cacumen Tamaricis, adopt soak with ethanol extraction, methanol ultrasonic extraction more, obtain total flavones, these method gained flavone impurity are many, and content is low, and fail material effective component is fully extracted, raw material availability is low.
Summary of the invention
The purpose of this invention is to provide a kind of technology of extracting total flavones and total saponins in the Cacumen Tamaricis simultaneously, this method is simple to operate, be easy to industrialization.
The objective of the invention is to be achieved through the following technical solutions: with the raw material Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into coarse powder, coarse powder is removed liposoluble substances such as chlorophyll with petroleum ether (60-90 ℃) backflow 2-4h, with petroleum ether volatilize and drying after, add the low-carbon alcohols organic solvent extraction, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml, cross the saturated absorption of associating macroporous adsorbent resin, use earlier the deionized water eluting, discard water lotion, use ammonia more successively, 20%-50% ethanol, the 60%-80% ethanol elution merges ammonia and 20-50% ethanol elution, slowly regulate pH to 2-4, staticly settle, deionized water cyclic washing final vacuum drying gets total flavones; The 60-80% ethanol elution is added the medicinal carbon of 2%-5%, reflux, filtered while hot, decompression filtrate recycling ethanol concentrates, dry, the Cacumen Tamaricis total saponins.
Described low-carbon alcohols organic solvent is a kind of in ethanol, methanol, the isopropyl alcohol, and the liquid material is than being 6:1-12:1, and extracting method is a kind of in percolation, ultrasonic, Soxhlet, microwave or the reflux, extract.
Described associating macroporous adsorbent resin is two kinds of macroporous resins, be loaded on the position up and down of resin column respectively, the centre separates with absorbent cotton, upper strata and lower-layer resin ratio are 2:1, optional D101 of upper strata resin or AB-8 type macroporous adsorbent resin, a kind of among the optional DM301 of lower-layer resin, LD605, D140, D141, the HPD100.
Described ammonia is the ammonia spirit of 0.05-2%.
The invention has the beneficial effects as follows: the present invention only needed macroporous resin column one time, can obtain total flavones and total saponins in the Cacumen Tamaricis, by ammonia and low pure eluting, improve the flavone yield, to the total saponins processing of decolouring, improved the purity of saponin, the inventive method is reasonable in design, simple to operate, cost is low, is easy to industrialization production.
The specific embodiment
The present invention will the present invention is further illustrated in conjunction with specific embodiments, and following each embodiment only is used to illustrate the present invention, is not limitation of the present invention.
Embodiment 1:
Get Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into 20-60 order coarse powder, get the 1kg coarse powder and removed liposoluble substances such as chlorophyll in 2 hours with petroleum ether (60-90 ℃) reflux, extract,, with petroleum ether volatilize and drying after, add supersound extraction 1h in the 8L60% isopropyl alcohol supersound extraction jar, get extracting solution, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml and crosses the associating macroporous adsorptive resins, and this associating macroporous adsorbent resin is to separate with absorbent cotton in the middle of D101 macroporous resin and the DM301 macroporous resin, is loaded on the resin column the upper and lower respectively, the upper and lower resin ratio is 2:1, earlier use the deionized water eluting, discard water lotion, use 0.1% ammonia more successively, 30% ethanol, 60% ethanol elution, 0.1% ammonia and 30% ethanol elution are merged, transfer pH to 2.3, room temperature left standstill 20 hours, made the total flavones precipitation, filter, precipitate small amount of deionized water cyclic washing 5 times, vacuum drying obtains content and reaches 80% Cacumen Tamaricis total flavones; With the medicinal carbon of 60% eluent adding 3%, reflux, filtered while hot, decompression filtrate recycling ethanol, concentrated, vacuum drying obtain content and reach 70% Cacumen Tamaricis total saponins.
Embodiment 2:
Get Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into 20-60 order coarse powder, get the 1kg coarse powder and removed liposoluble substances such as chlorophyll in 3.5 hours with petroleum ether (60-90 ℃) reflux, extract,, with petroleum ether volatilize and drying after, add microwave extraction 1h in the 10L90% methanol microwave extraction tank, get extracting solution, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml and crosses the associating macroporous adsorptive resins, and this associating macroporous adsorbent resin is to separate with absorbent cotton in the middle of D101 macroporous resin and the D140 macroporous resin, is loaded on the resin column the upper and lower respectively, the upper and lower resin ratio is 2:1, earlier use the deionized water eluting, discard water lotion, use 0.05% ammonia more successively, 50% ethanol, 80% ethanol elution, 0.1% ammonia and 50% ethanol elution are merged, transfer pH to 3.5, room temperature left standstill 20 hours, made the total flavones precipitation, filter, precipitate small amount of deionized water cyclic washing 6 times, vacuum drying obtains content and reaches 75% Cacumen Tamaricis total flavones; With the medicinal carbon of 80% eluent adding 2.5%, reflux, filtered while hot, decompression filtrate recycling ethanol, concentrated, vacuum drying obtain content and reach 60% Cacumen Tamaricis total saponins.
Embodiment 3:
Get Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into 20-60 order coarse powder, get the 1kg coarse powder and removed liposoluble substances such as chlorophyll in 4 hours with petroleum ether (60-90 ℃) reflux, extract,, with petroleum ether volatilize and drying after, add microwave extraction 1h in the 12L75% ethanol microwave extraction tank, get extracting solution, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml and crosses the associating macroporous adsorptive resins, and this associating macroporous adsorbent resin is to separate with absorbent cotton in the middle of AB-8 macroporous resin and the LD605 macroporous resin, is loaded on the resin column the upper and lower respectively, the upper and lower resin ratio is 2:1, earlier use the deionized water eluting, discard water lotion, use 2% ammonia more successively, 25% ethanol, 70% ethanol elution, 0.1% ammonia and 25% ethanol elution are merged, transfer pH to 3.0, room temperature left standstill 20 hours, made the total flavones precipitation, filter, precipitate small amount of deionized water cyclic washing 6 times, vacuum drying obtains content and reaches 80% Cacumen Tamaricis total flavones; With the medicinal carbon of 70% eluent adding 4%, reflux, filtered while hot, decompression filtrate recycling ethanol, concentrated, vacuum drying obtain content and reach 70% Cacumen Tamaricis total saponins.
Embodiment 4:
Get Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into 20-60 order coarse powder, get the 1kg coarse powder and removed liposoluble substances such as chlorophyll in 2.5 hours with petroleum ether (60-90 ℃) reflux, extract,, with petroleum ether volatilize and drying after, add in the 6L65% isopropyl alcohol apparatus,Soxhlet's and extract 1h, get extracting solution, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml and crosses the associating macroporous adsorptive resins, and this associating macroporous adsorbent resin is to separate with absorbent cotton in the middle of D101 macroporous resin and the HPD100 macroporous resin, is loaded on the resin column the upper and lower respectively, the upper and lower resin ratio is 2:1, earlier use the deionized water eluting, discard water lotion, use 0.15% ammonia more successively, 20% ethanol, 60% ethanol elution, 0.1% ammonia and 20% ethanol elution are merged, transfer pH to 2.0, room temperature left standstill 20 hours, made the total flavones precipitation, filter, precipitate small amount of deionized water cyclic washing 5 times, vacuum drying obtains content and reaches 80% Cacumen Tamaricis total flavones; With the medicinal carbon of 60% eluent adding 5%, reflux, filtered while hot, decompression filtrate recycling ethanol, concentrated, vacuum drying obtain content and reach 70% Cacumen Tamaricis total saponins.
Embodiment 5:
Get Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into 20-60 order coarse powder, get the 1kg coarse powder and removed liposoluble substances such as chlorophyll in 3 hours with petroleum ether (60-90 ℃) reflux, extract,, with petroleum ether volatilize and drying after, add in the 7L60% ethanol Soxhlet extraction device and extract 1h, get extracting solution, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml and crosses the associating macroporous adsorptive resins, and this associating macroporous adsorbent resin is to separate with absorbent cotton in the middle of D101 macroporous resin and the LD605 macroporous resin, is loaded on the resin column the upper and lower respectively, the upper and lower resin ratio is 2:1, earlier use the deionized water eluting, discard water lotion, use 0.1% ammonia more successively, 30% ethanol, 75% ethanol elution, 0.1% ammonia and 30% ethanol elution are merged, transfer pH to 2.8, room temperature left standstill 20 hours, made the total flavones precipitation, filter, precipitate small amount of deionized water cyclic washing 4 times, vacuum drying obtains content and reaches 70% Cacumen Tamaricis total flavones; With the medicinal carbon of 75% eluent adding 3.5%, reflux, filtered while hot, decompression filtrate recycling ethanol, concentrated, vacuum drying obtain content and reach 65% Cacumen Tamaricis total saponins.
Embodiment 6:
Get Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into 20-60 order coarse powder, get the 1kg coarse powder and removed liposoluble substances such as chlorophyll in 2.5 hours with petroleum ether (60-90 ℃) reflux, extract,, with petroleum ether volatilize and drying after, add supersound extraction 1h in the 9L80% methanol supersound extraction jar, get extracting solution, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml and crosses the associating macroporous adsorptive resins, and this associating macroporous adsorbent resin is to separate with absorbent cotton in the middle of AB-8 macroporous resin and the D140 macroporous resin, is loaded on the resin column the upper and lower respectively, the upper and lower resin ratio is 2:1, earlier use the deionized water eluting, discard water lotion, use 0.05% ammonia more successively, 40% ethanol, 75% ethanol elution, 0.1% ammonia and 40% ethanol elution are merged, transfer pH to 3.4, room temperature left standstill 20 hours, made the total flavones precipitation, filter, precipitate small amount of deionized water cyclic washing 4 times, vacuum drying obtains content and reaches 80% Cacumen Tamaricis total flavones; With the medicinal carbon of 75% eluent adding 2%, reflux, filtered while hot, decompression filtrate recycling ethanol, concentrated, vacuum drying obtain content and reach 70% Cacumen Tamaricis total saponins.
Embodiment 7:
Get Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into 20-60 order coarse powder, get the 1kg coarse powder and removed liposoluble substances such as chlorophyll in 2 hours with petroleum ether (60-90 ℃) reflux, extract,, with petroleum ether volatilize and drying after, add supersound extraction 1h in the 11L70% ethanol ultrasonic extraction jar, get extracting solution, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml and crosses the associating macroporous adsorptive resins, and this associating macroporous adsorbent resin is to separate with absorbent cotton in the middle of AB-8 macroporous resin and the DM301 macroporous resin, is loaded on the resin column the upper and lower respectively, the upper and lower resin ratio is 2:1, earlier use the deionized water eluting, discard water lotion, use 0.2% ammonia more successively, 45% ethanol, 80% ethanol elution, 0.1% ammonia and 45% ethanol elution are merged, transfer pH to 4.0, room temperature left standstill 20 hours, made the total flavones precipitation, filter, precipitate small amount of deionized water cyclic washing 6 times, vacuum drying obtains content and reaches 70% Cacumen Tamaricis total flavones; With the medicinal carbon of 80% eluent adding 4.5%, reflux, filtered while hot, decompression filtrate recycling ethanol, concentrated, vacuum drying obtain content and reach 65% Cacumen Tamaricis total saponins.

Claims (4)

1. extract the technology of total flavones and total saponins in the Cacumen Tamaricis simultaneously, it is characterized in that: with the raw material Cacumen Tamaricis in oven drying at low temperature below 70 ℃, be ground into coarse powder, coarse powder is removed liposoluble substances such as chlorophyll with petroleum ether (60-90 ℃) backflow 2-4h, with petroleum ether volatilize and drying after, add the low-carbon alcohols organic solvent extraction, extracting liquid filtering and reclaim under reduced pressure, concentrated solution adds water to 0.5g crude drug/ml, cross the saturated absorption of associating macroporous adsorbent resin, use the deionized water eluting earlier, discard water lotion, use ammonia more successively, 20%-50% ethanol, the 60%-80% ethanol elution, ammonia and 20-50% ethanol elution are merged, slowly regulate pH to 2-4, staticly settle, deionized water cyclic washing final vacuum drying gets total flavones; The 60-80% ethanol elution is added the medicinal carbon of 2%-5%, reflux, filtered while hot, decompression filtrate recycling ethanol concentrates, dry, the Cacumen Tamaricis total saponins.
2. the technology of extracting total flavones and total saponins in the Cacumen Tamaricis simultaneously as claimed in claim 1, it is characterized in that: described low-carbon alcohols organic solvent is a kind of in ethanol, methanol, the isopropyl alcohol, the liquid material is than for 6:1-12:1, and extracting method is a kind of in percolation, ultrasonic, Soxhlet, microwave or the reflux, extract.
3. the technology of extracting total flavones and total saponins in the Cacumen Tamaricis simultaneously as claimed in claim 1, it is characterized in that: described associating macroporous adsorbent resin is two kinds of macroporous resins, be loaded on the position up and down of resin column respectively, the centre separates with absorbent cotton, upper strata and lower-layer resin ratio are 2:1, optional D101 of upper strata resin or AB-8 type macroporous adsorbent resin, a kind of among the optional DM301 of lower-layer resin, LD605, D140, D141, the HPD100.
4. the technology of extracting total flavones and total saponins in the Cacumen Tamaricis simultaneously as claimed in claim 1, it is characterized in that: described ammonia is the ammonia spirit of 0.05-2%.
CN2011102255603A 2011-08-08 2011-08-08 Process for simultaneously extracting general flavone and total saponins from Chinese tamarisk twigs Pending CN102266363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011102255603A CN102266363A (en) 2011-08-08 2011-08-08 Process for simultaneously extracting general flavone and total saponins from Chinese tamarisk twigs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011102255603A CN102266363A (en) 2011-08-08 2011-08-08 Process for simultaneously extracting general flavone and total saponins from Chinese tamarisk twigs

Publications (1)

Publication Number Publication Date
CN102266363A true CN102266363A (en) 2011-12-07

Family

ID=45048947

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011102255603A Pending CN102266363A (en) 2011-08-08 2011-08-08 Process for simultaneously extracting general flavone and total saponins from Chinese tamarisk twigs

Country Status (1)

Country Link
CN (1) CN102266363A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103599146A (en) * 2013-11-11 2014-02-26 淮海工学院 Preparation method and use of diuretic composition
CN104069063A (en) * 2014-05-22 2014-10-01 安东 Hydroxyfasudil pharmaceutical composition and preparation method thereof
CN105920065A (en) * 2016-04-21 2016-09-07 肇庆医学高等专科学校 Separation and purification method of begonia fimbritipula saponin and application of begonia fimbritipula saponin
CN109602770A (en) * 2018-12-31 2019-04-12 山东省林业科学研究院 A kind of Chinese tamarisk leaf leachate rapid extracting method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103599146A (en) * 2013-11-11 2014-02-26 淮海工学院 Preparation method and use of diuretic composition
CN103599146B (en) * 2013-11-11 2016-04-27 淮海工学院 A kind of preparation method of diuretic compositions and purposes
CN104069063A (en) * 2014-05-22 2014-10-01 安东 Hydroxyfasudil pharmaceutical composition and preparation method thereof
CN104069063B (en) * 2014-05-22 2019-03-26 西藏九瑞健康股份有限公司 Fasudic hydrochloride pharmaceutical composition and preparation method thereof
CN105920065A (en) * 2016-04-21 2016-09-07 肇庆医学高等专科学校 Separation and purification method of begonia fimbritipula saponin and application of begonia fimbritipula saponin
CN109602770A (en) * 2018-12-31 2019-04-12 山东省林业科学研究院 A kind of Chinese tamarisk leaf leachate rapid extracting method

Similar Documents

Publication Publication Date Title
CN103694364A (en) Method for synchronously extracting, separating and purifying polysaccharides and flavones of cyclocarya paliurus
CN112870236B (en) Flavone effective part of abelmoschus manihot and preparation method and application thereof
CN102908464A (en) Radix tetrastigme micro powder and preparation method and application thereof
CN102266363A (en) Process for simultaneously extracting general flavone and total saponins from Chinese tamarisk twigs
CN104127451B (en) A kind of method simultaneously extracting polyphenol, flavonoid and triterpenes from Flos Granati
CN107929337A (en) A kind of preparation method and application of Panax stipuleanatus Tsai et Feng anti-inflammatory active component
CN103623075B (en) The preparation method of Flos Trollii extract
CN100534508C (en) Method for extracting effective sites group of smilax China root
CN1899382B (en) Method for preparing forsythia fruit effective part
CN104387362A (en) Iridoid ester compounds, and preparation method and application thereof
CN105175426B (en) A kind of method of the extraction purification Bergenin from treebine stem
CN101780126B (en) Ginsenoside compound in syringa pubescens turca and extraction method and application thereof
CN101531721B (en) Industrial preparation method for triterpenoid saponin monomer
CN101322734B (en) Codonopsis lanceolata total saponins with anti-inflammatory immunity function and preparation thereof
CN102895303A (en) Resin purification method for extracting and separating total flavone of cyclocarya paliurus
CN102329350A (en) Method for extracting mulberroside A from white mulberry root-bark
CN107722080A (en) A kind of method that ursin is extracted in the leaf from purple bergenia herb
CN101721449B (en) Method for preparing lindley eupatorium herb general flavone by using attapulgite adsorption method
CN102188497B (en) Preparation method of total alkali of corydalis tuber, and corydalis tuber preparation and use thereof
CN102861133A (en) Method for extracting kavalactones by using subcritical water
CN102274254B (en) Preparation method of alligator alternanthera effective fraction extract
CN102512469A (en) Semi-bionic and flooding extraction and preparation method for surface portion of American ginseng
CN101181336A (en) Method for refining valid target of bitter gourd for dropping blood sugar
CN105497230A (en) Tetradium ruticarpum fruit effective ingredient extract as well as preparation method and application thereof
CN1745774A (en) Chinese medicinal preparation for treating pharyngolaryngitis and its making method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20111207