CN100427717C - Sound absorbing and insulating ventilation window - Google Patents
Sound absorbing and insulating ventilation window Download PDFInfo
- Publication number
- CN100427717C CN100427717C CNB2005100403662A CN200510040366A CN100427717C CN 100427717 C CN100427717 C CN 100427717C CN B2005100403662 A CNB2005100403662 A CN B2005100403662A CN 200510040366 A CN200510040366 A CN 200510040366A CN 100427717 C CN100427717 C CN 100427717C
- Authority
- CN
- China
- Prior art keywords
- window
- frame
- sound absorption
- glass
- layer frame
- 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.)
- Expired - Fee Related
Links
- 238000009423 ventilation Methods 0.000 title claims description 25
- 239000011521 glass Substances 0.000 claims abstract description 51
- 238000010521 absorption reaction Methods 0.000 claims description 56
- 238000009413 insulation Methods 0.000 claims description 20
- 239000005357 flat glass Substances 0.000 claims description 9
- 238000007667 floating Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000013022 venting Methods 0.000 abstract 2
- 238000004134 energy conservation Methods 0.000 description 5
- 229920000515 polycarbonate Polymers 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Landscapes
- Special Wing (AREA)
- Building Environments (AREA)
Abstract
The present invention discloses a venting soundproof window with simple structure, which comprises a window frame fixed to a wall, and a group of glass windows arranged on the window frame, wherein the window frame comprises an outer layer frame arranged at the outer side of the wall and an inner layer frame arranged at the inner side of the wall. The glass windows which can be opened are arranged on the outer layer frame and the inner layer frame, and a sound absorbing hollow cavity is formed between the glass window on the outer layer frame and the glass window on the inner layer frame. A transparent sound absorbing member for lowering noise is arranged in the sound absorbing hollow cavity, and according to a requirement, the present invention can have two structural forms of a sound brake type and a resonance type. A light shielding and heat insulating curtain can be arranged between the outer layer frame and the inner layer frame, and compared with the prior art, by using a muffling passage arranged between two double-layer windows, the present invention satisfies venting requirement and enhances soundproof effect. The present invention is particularly suitable for various high-grade dwelling houses and office buildings and has maximum practical value and extensive market outlook.
Description
One, technical field
The present invention relates to the window in a kind of commercial and residential building, specifically a kind of sound absorbing and insulating ventilation window that can reduce noise in the room and keep ventilating.
Two, background technology
Along with developing rapidly of modern industry, transportation and urban construction, pollution from environmental noise has become one of public hazards of impact at home and abroad quality of residents'life maximum.Live in noisy metropolis, in the traffic route both sides, be subjected to the harm of noise all day the people of industrial occupancy, have a strong impact on people's life and physical and mental health.Because living standard is low in the past; people are not to take notice of very much to noise; but along with the raising of people's living standard and the enhancing of sense of self-protection, ambient noise has become the problem that common people extremely are concerned about, and the dwelling environment that has a quietness is everybody common hope.Simultaneously, along with the propelling of society, reasonable energy utilization has become the major subjects of sustainable development, and people are when pursuing quality of life, and how the problem of getting along with natural harmony is also outstanding day by day.
Present existing window is mainly aluminium alloys, plastic-steel and forms such as a spot of steel sash, timber window, the window of these forms has a common shortcoming: can natural ventilation when windowing but do not reach the effect of sound insulation, and defening effect difference and can not natural ventilation when closing window.
Three, summary of the invention
The purpose of this invention is to provide a kind of sound absorbing and insulating ventilation window simple in structure.This sound absorbing and insulating ventilation window can be realized the noise reduction of 15-20dB under the condition that guarantees natural ventilation, when closing vent window, defening effect is better, can reach more than the 45dB.
The objective of the invention is to be achieved through the following technical solutions:
A kind of sound absorbing and insulating ventilation window, comprise window frame that is fixed on the body of wall and the one group of glass window that is arranged on the window frame, it is characterized in that: described window frame comprises outer frame that is arranged on wall outer side and the internal layer frame that is arranged on the body of wall inboard, is equipped with openable glass window on outer frame and internal layer frame; Between the glass window on glass window on the outer frame and the internal layer frame, form the sound absorption cavity, in this sound absorption cavity, be provided with the Transparent Sound Absorption Component that is used for reducing noise.
Among the present invention, for most reflect heat or completely cut off outside in the room, thereby reached the purpose of energy conservation, between skin and internal layer frame, the shading Thermal insulation curtain is set, this curtain can play the isolated heat energy that flashes back the sunlight and combine with inboard window, thereby the heat energy that is brought by window is controlled at outside the room, has played the effect of energy conservation.The present invention's sound absorption window that ventilates can adopt sun blind to form reflective heat according to the different functions of use in room, and daylighting is simultaneously energy-conservation down; Also can adopt complete light tight curtain heat-insulating bridge-cut-off, thereby increase the sound absorption amount of window, environmental protection and energy saving again.
Among the present invention, for needs that cater to market and the demand that satisfies the user, ventilation sound absorption energy saving window has two kinds of form of structure:
First kind is sound lock type ventilation sound absorption energy saving window, the glass window of wall outer side is the floating window structure that both sides can outwards be opened, described Transparent Sound Absorption Component is arranged on the transparent microperforated panel on the window glass that wafts, this transparent microperforated panel is begun to slope inwardly by the window glass both sides of wafing and is arranged in the sound absorption cavity, and is connected in the window glass middle part formation sound absorption resonator that wafts; Between outer window frame and internal layer window frame, the shading Thermal insulation curtain is set.
Second kind is mode of resonance ventilation sound absorption energy saving window, glass window one end of wall outer side can outwards be opened, described Transparent Sound Absorption Component is arranged on the transparent microperforated panel on the other end glass window, this transparent microperforated panel by the open place begin to slope inwardly be arranged on the sound absorption cavity in and be fixed on this headwall body; The end that the glass window of body of wall inboard is opposite with the glass window in the outside can inwardly be opened, described Transparent Sound Absorption Component is arranged on the transparent microperforated panel on the other end inner glass window, this transparent microperforated panel by the open place begin outward-dipping be arranged on the sound absorption cavity in and be fixed on this headwall body.The glass window that the body of wall inboard is set and the transparent microperforated panel on the glass window in the outside be common to constitute a parallel sound absorption cavity; Between outer window frame and internal layer window frame, the shading Thermal insulation curtain is set.
Ventilation sound absorption energy saving window of the present invention realizes the acoustics noise reduction according to " double panel structure soundproof theory ", " two pass soundproof door and sound lock principle " and " microwell plate resonance sound-absorbing principle ".
The structural form of doubling plate " plate-air-plate " is as the system of " quality-spring-quality ", when the sound wave of space outerpace projects first laminate, part acoustic energy is reflected, part loss in first laminate, and a part is transmitted in the air between plate and the plate.The sound wave that is transmitted to the space projects again in second laminate after attenuation of air.Equally, project in second laminate sound wave again part be reflected, part loss in plate, remaining part be transmitted to indoor in because through secondary reflection and loss again, sound wave has very big decay, sound-insulation capability has significantly and improves.In addition, transmission angle from vibrational energy, owing to be not rigidly connected between two plates, sound wave can not be directly passed on second laminate in the vibration on first laminate, have only by the transfer of air between two plates, and air has very big elastic deformation, and the transmission of the vibrational energy between two plates of having decayed is greatly improved the sound insulation property of double panel structure.
In order to take into account natural ventilation, formed an approximate door socket between the double-decker cavity among the present invention, formed " sound lock ", " sound lock " can play the effect of the effect that improves sound absorption.Transparent microperforated panel resonant structure is set between bilayer, sound absorption and sound insulation are combined, obtained more satisfactory acoustically effective in practice.Therefore the microperforated panel resonant structure can be regarded as a resonator system of being made up of quality and spring because it is the combination of Hai Muhuozhi resonator, and its good acoustically effective has obtained general approval.And transparent microwell plate is comprehensive and improved the acoustical behavior of virgin metal microperforated panel sound absorbing member and the advantages such as design esthetics in original building place, and sound absorption and building finishing are combined, and can satisfy on-the-spot transparent daylighting, protection against the tide and fireproof requirement.Transparent microwell plate can be made by transparent polycarbonate material, utilizes transparent polycarbonate material favorable mechanical processing characteristics, increases material thickness, or the punching aperture diminishes, and can significantly improve sound absorbing capabilities.
Compared with prior art, the present invention utilizes the noise elimination passage is set between the double window, has both satisfied air-conditioning requirement, has improved the sound absorption effect again.The present invention has following beneficial effect:
1. utilize " sound lock " and noise elimination passage are set between the double window, both satisfied air-conditioning requirement, the good sound absorption effect of having got back.
2. kept the sound insulation, daylighting, insulation, waterproof, fire prevention of ordinary window, the advantage of antitheft, shielding of ultraviolet, increased under the condition of natural ventilation, can guarantee effectively to absorb sound and the function of defening effect;
3. utilize the clear polycarbonate plate of selecting for use to have the favorable mechanical processing characteristics, the microperforated panel of processing punching out, the sound absorption coefficient height, transparent quality is good, can satisfy window daylighting and sound absorption;
4. utilize the oblique vibration shape cavity of the transparent microperforated panel acoustic frequency bandwidth that is provided with,, have good sound absorption especially to low-frequency sound wave.
Four, description of drawings
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the structural representation of another embodiment of the present invention;
Fig. 3 is the structural representation of third embodiment of the invention.
Five, the specific embodiment
A kind of ventilation sound absorption energy saving window of the present invention, comprise window frame 1 that is fixed on the body of wall and the one group of glass window 2 that is arranged on the window frame 1, window frame 1 comprises outer frame 3 that is arranged on wall outer side and the internal layer frame 4 that is arranged on the body of wall inboard, is equipped with openable glass window 2 on outer frame 3 and internal layer frame 4; Between glass window 2 on the outer frame 3 and the glass window 2 on the internal layer frame 4, form sound absorption cavity 5, in this sound absorption cavity 5, be provided with the Transparent Sound Absorption Component 6 that is used for reducing noise.For most reflect heat or completely cut off outside, thereby reached the purpose of energy conservation in the room, outer 3 and internal layer frame 4 between shading Thermal insulation curtain 8 is set.
For needs that cater to market and the demand that satisfies the user, in the specific implementation, the present invention can have following three kinds of form of structure:
Embodiment 1
First kind of mode of resonance sound absorbing and insulating ventilation window of the present invention, glass window 2 one ends of wall outer side can outwards be opened, Transparent Sound Absorption Component 6 is arranged on the transparent microperforated panel 7 on the other end glass window, and this transparent microperforated panel 7 is begun to slope inwardly by the open place and is arranged in the sound absorption cavity 5 and is fixed on this headwall body; The glass window 2 of body of wall inboard and the glass window in the outside 2 opposite ends can inwardly be opened, Transparent Sound Absorption Component 6 is arranged on the transparent microperforated panel 7 on the other end inner glass window, and this transparent microperforated panel 7 is begun outward-dippingly to be arranged in the sound absorption cavity 5 and to be fixed on this headwall body by the open place.The glass window that the body of wall inboard is set and the transparent microperforated panel on the glass window in the outside be common to constitute a parallel sound absorption cavity.Present embodiment is provided with double-deck sound absorption window at body of wall window place, and the centre of inside and outside forms is provided with transparent microperforated panel mode of resonance sound absorption construction.Transparent parallel sound absorption cavity is established the end of with in the top, and the cavity thickness size is determined according to the height of shaped steel.Between outer frame and internal layer frame shading Thermal insulation curtain 8 is set, Thermal insulation curtain 8 can be divided into blinds reflect type, light tight type according to the room functions difference.
Second kind of sound lock type sound absorbing and insulating ventilation window of the present invention, the floating window structure that the glass window 2 of wall outer side can outwards be opened for both sides, the glass window 2 of body of wall inboard is divided into three parts, and mid portion glass window 2 can inwardly be opened.Transparent Sound Absorption Component 6 is arranged on the transparent microperforated panel 7 on the window glass that wafts, and this transparent microperforated panel 7 is begun to slope inwardly by the window glass both sides of wafing and is arranged in the sound absorption cavity 5, and is connected in the high point of window glass middle part formation that wafts.Present embodiment is provided with the sound absorption window that wafts outside the body of wall window, upper-lower seal installs transparent mode of resonance sound absorption cavity additional in the inboard.Transparent parallel sound absorption cavity is established the end of with in the top, and the cavity thickness size according to the needs of different user, becomes forms such as flat opening, top hung in conjunction with the different designs of ventilation effect.Between outer frame and internal layer frame, shading Thermal insulation curtain 8 is set, can be divided into blinds reflect type, light tight type according to the room functions difference.
The third sound lock type sound absorbing and insulating ventilation window of the present invention, the glass window 2 of wall outer side is the floating window structure that a side can outwards be opened, the glass window 2 of body of wall inboard is divided into three parts, can inwardly open with the glass window 2 of the openable glass window 2 relative sides in the outside.Other structure is identical with embodiment 2.
The forms framework adopts aluminium alloys or heat-insulating bridge-cut-off section bar among the present invention, and section bar all is hollow cavity structures.Glass adopts double-deck doubling glass structure.Increase transparent microperforated panel resonance sound-absorbing structure in the inboard of glass, form is the chamber resonant structure that tiltedly shakes, and adopts the weather strip sealing between section bar and the section bar, and contact position cement or glue are fixing floating between forms and the body of wall.Keep the sound insulation, daylighting, insulation, waterproof, fire prevention of original window, the advantage of antitheft, shielding of ultraviolet, under the condition of natural ventilation, improved sound absorption, sound insulation and effect of heat insulation.
Processing technology of the present invention and ordinary window are basic identical, and sash can arbitrarily be controlled opening angle, satisfy different ventilation requirements.What distinguished is to have installed sound absorbing member and shading Thermal insulation curtain in the middle of two-layer window additional, sound absorbing member adopts the good clear polycarbonate microperforated panel of punching out, cavity structure is according to the frequency and on-the-spot concrete actual the deciding of sound wave, the general employing chamber cavity structure that tiltedly shakes reaches the noise of control broad frequency band.The shading Thermal insulation curtain can adopt reflect type or light tight type to reach the energy-conservation optimum efficiency in room according to the function of use in this room.
Claims (3)
1, a kind of sound absorbing and insulating ventilation window, comprise the window frame (1) that is fixed on the body of wall and be arranged on one group of glass window (2) on the window frame (1), it is characterized in that: described window frame (1) comprises outer frame (3) that is arranged on wall outer side and the internal layer frame (4) that is arranged on the body of wall inboard, is equipped with openable glass window (2) on outer frame (3) and internal layer frame (4); Between glass window (2) on the outer frame (3) and the glass window (2) on the internal layer frame (4), form sound absorption cavity (5), in this sound absorption cavity (5), be provided with the Transparent Sound Absorption Component (6) that is used for reducing noise; The floating window structure that the glass window of wall outer side (2) can outwards be opened for both sides, described Transparent Sound Absorption Component (6) is arranged on the transparent microperforated panel (7) on the window glass that wafts, this transparent microperforated panel (7) is begun to slope inwardly by the window glass both sides of wafing and is arranged in the sound absorption cavity (5), and is connected in the window glass middle part formation sound absorption resonator that wafts.
2, a kind of sound absorbing and insulating ventilation window, comprise the window frame (1) that is fixed on the body of wall and be arranged on one group of glass window (2) on the window frame (1), it is characterized in that: described window frame (1) comprises outer frame (3) that is arranged on wall outer side and the internal layer frame (4) that is arranged on the body of wall inboard, is equipped with openable glass window (2) on outer frame (3) and internal layer frame (4); Between glass window (2) on the outer frame (3) and the glass window (2) on the internal layer frame (4), form sound absorption cavity (5), in this sound absorption cavity (5), be provided with the Transparent Sound Absorption Component (6) that is used for reducing noise; Glass window (2) one ends of wall outer side can outwards be opened, described Transparent Sound Absorption Component (6) is arranged on the transparent microperforated panel (7) on the other end glass window (2), and this transparent microperforated panel (7) is begun to slope inwardly by the open place and is arranged in sound absorption cavity (5) and is fixed on this headwall body; The end that the glass window of body of wall inboard (2) is opposite with the glass window (2) in the outside can inwardly be opened, described Transparent Sound Absorption Component (6) is arranged on the transparent microperforated panel (7) on the other end inner glass window (2), and this transparent microperforated panel (7) is begun outward-dippingly to be arranged in sound absorption cavity (5) and to be fixed on this headwall body by the open place.
3, sound absorbing and insulating ventilation window according to claim 1 and 2 is characterized in that: be provided with shading Thermal insulation curtain (8) between outer frame (3) and internal layer frame (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100403662A CN100427717C (en) | 2005-06-02 | 2005-06-02 | Sound absorbing and insulating ventilation window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100403662A CN100427717C (en) | 2005-06-02 | 2005-06-02 | Sound absorbing and insulating ventilation window |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1702286A CN1702286A (en) | 2005-11-30 |
| CN100427717C true CN100427717C (en) | 2008-10-22 |
Family
ID=35632216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100403662A Expired - Fee Related CN100427717C (en) | 2005-06-02 | 2005-06-02 | Sound absorbing and insulating ventilation window |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100427717C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647346A (en) * | 2016-09-26 | 2017-05-10 | 郑州云海信息技术有限公司 | Electronic noise reduction system control method and device |
| CN108894699A (en) * | 2018-08-09 | 2018-11-27 | 天津城建大学 | A kind of sound insulation room window of transparent microperforated panel compound structure |
| JP2022516828A (en) * | 2018-11-22 | 2022-03-03 | ハウジング・アンド・ディヴェロップメント・ボード | Improved windows and window systems |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121451A (en) * | 1982-06-01 | 1983-12-21 | Sound Engineering Limited | Sound insulating structures |
| CN2402781Y (en) * | 1999-11-02 | 2000-10-25 | 张学明 | Ventilation sound-insulation energy-saving window |
| CN2411327Y (en) * | 2000-03-20 | 2000-12-20 | 北京市劳动保护科学研究所 | Sound insulation and ventilation window |
-
2005
- 2005-06-02 CN CNB2005100403662A patent/CN100427717C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121451A (en) * | 1982-06-01 | 1983-12-21 | Sound Engineering Limited | Sound insulating structures |
| CN2402781Y (en) * | 1999-11-02 | 2000-10-25 | 张学明 | Ventilation sound-insulation energy-saving window |
| CN2411327Y (en) * | 2000-03-20 | 2000-12-20 | 北京市劳动保护科学研究所 | Sound insulation and ventilation window |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1702286A (en) | 2005-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100427717C (en) | Sound absorbing and insulating ventilation window | |
| CN201205479Y (en) | Plate type air noise reduction, dust removal filter and noise reduction, dust removal ventilation window | |
| CN206888873U (en) | Fresh air sound insulation window system | |
| CN211500420U (en) | Noise-reduction ventilation convex window | |
| CN203796129U (en) | Ventilation sound-proof window | |
| CN204024395U (en) | Many sound effects ventilated and soundproof window | |
| CN201474547U (en) | Steel sound-proof door | |
| CN201367811Y (en) | Sound-insulating and venting window | |
| CN207538674U (en) | A kind of indoor two-leaf type sliding door with soundproof effect | |
| CN215629515U (en) | Sound-absorbing noise-reducing effect good sound insulation board for road | |
| CN206091811U (en) | Sound proof window | |
| CN202467572U (en) | Ventilation sound proof window | |
| CN215565536U (en) | Natural draft soundproof window | |
| CN104790839A (en) | Micro-hole type sound eliminating and isolating window | |
| CN207944865U (en) | A kind of noise elimination vent window | |
| CN218912721U (en) | Mute heat-preserving heat-insulating metal window | |
| CN211777007U (en) | Sound insulation window | |
| CN204457337U (en) | Ventilated and soundproof window | |
| CN2727365Y (en) | Ventilating sound-insulating window | |
| CN214145291U (en) | Ventilation noise reduction window | |
| CN210178187U (en) | Sealing and sound-insulating device for door and window glass | |
| CN219034511U (en) | High-efficiency sound-insulation hollow glass | |
| CN211115618U (en) | Effectual door gives sound insulation | |
| KR102581990B1 (en) | Hybrid sound proof door for indoor and outdoor | |
| CN210768464U (en) | Heat-insulating noise-reducing aluminum alloy window |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Changrong Environmental & Acousitc Engineering Co., Ltd. Assignor: Zhang Rongchu Contract record no.: 2011320000138 Denomination of invention: Sound absorbing and insulating ventilation window Granted publication date: 20081022 License type: Exclusive License Open date: 20051130 Record date: 20110303 |
|
| ASS | Succession or assignment of patent right |
Owner name: NANJING CHANGRONG ACOUSTIC CO., LTD. Free format text: FORMER OWNER: ZHANG RONGCHU Effective date: 20141223 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210018 NANJING, JIANGSU PROVINCE TO: 210008 NANJING, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141223 Address after: 1309 room 268, No. 210008, Zhongshan Road, Jiangsu, Nanjing Patentee after: NANJING CHANGRONG ACOUSTIC CO., LTD. Address before: 210018, room 117, 3205 Cheng Yin Street, Xuanwu District, Jiangsu, Nanjing Patentee before: Zhang Rongchu |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: NANJING CHANGRONG ACOUSTIC CO., LTD. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: NANJING CHANGRONG ACOUSTIC Inc. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20190602 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |