CN212799905U - Novel sewage treatment recycle device - Google Patents
Novel sewage treatment recycle device Download PDFInfo
- Publication number
- CN212799905U CN212799905U CN202021617658.4U CN202021617658U CN212799905U CN 212799905 U CN212799905 U CN 212799905U CN 202021617658 U CN202021617658 U CN 202021617658U CN 212799905 U CN212799905 U CN 212799905U
- Authority
- CN
- China
- Prior art keywords
- box
- rectangular
- rectangular box
- wall
- filter screen
- 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
Images
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
本实用新型公开了一种新型污水处理回收利用装置，包括回收箱，所述回收箱的底部四角均固定连接有支腿，回收箱的右侧底部连通并固定有排水管，且排水管的一端连通并固定有阀门，所述回收箱的顶部一侧固定连接有左侧为开口设置的矩形箱，矩形箱的顶部连通并固定有进管，矩形箱内密封活动套设有顶部和底部均为开口设置的矩形盒，矩形箱的底部连通并固定有出液斗，且出液斗的底部延伸至回收箱内。本实用新型设计合理，便于对污水中的颗粒杂质预先过滤收集和快速取出，避免颗粒杂质进入活性炭颗粒滤料内，延长活性炭颗粒滤料的更换周期，且能够简便快速的取下上滤网进行清理或对活性炭颗粒滤料更换，省时省力，有利于使用。
The utility model discloses a novel sewage treatment and recycling device, which comprises a recycling box. The four corners of the bottom of the recycling box are fixedly connected with outriggers. A valve is connected and fixed, the top side of the recovery box is fixedly connected with a rectangular box with an opening on the left side, the top of the rectangular box is connected and fixed with an inlet pipe, and the sealing movable sleeve in the rectangular box is provided with a top and a bottom that are both open. In the rectangular box provided with the opening, the bottom of the rectangular box is communicated with and fixed with a liquid outlet hopper, and the bottom of the liquid outlet hopper extends into the recovery box. The utility model has a reasonable design, which is convenient for pre-filtering, collecting and quickly taking out the particulate impurities in the sewage, preventing the particulate impurities from entering the activated carbon granular filter material, prolonging the replacement cycle of the activated carbon granular filter material, and the upper filter screen can be easily and quickly removed for cleaning. Cleaning or replacing the activated carbon particle filter material saves time and effort and is beneficial to use.
Description
Technical Field
The utility model relates to a sewage treatment technical field especially relates to a novel sewage treatment recycle device.
Background
In the recycling of domestic sewage, the domestic sewage refers to the wastewater generated in domestic water discharge and domestic sanitary facilities, and is the wastewater discharged in daily life of residents, and when water is used in a household, the water such as face washing, hand washing, vegetable washing and the like can be reprocessed and reused, for example, the water is used as toilet cleaning water, so a filtering and recycling device is needed to be used for filtering and recycling, and the waste of water resources which is increasingly tense is reduced.
Most of the existing domestic sewage treatment and recycling devices consist of a recycling box and an activated carbon filter box arranged in the recycling box, and the activated carbon can adsorb and purify toxic substances in sewage; it has the shortcoming that the granule impurity of being not convenient for in the sewage is concentrated to be collected and is taken out fast for in granule impurity in the sewage directly got into collection box and the active carbon filter box easily, cause the active carbon filter box to change frequently, though there is the simple filtration mode through fixed filter screen on the market, nevertheless there is inconvenient quick filter screen of shifting out and impurity problem of clearing up that exists more, to this phenomenon, therefore we have proposed a novel sewage treatment recycle device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a novel sewage treatment recycling device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel sewage treatment recycling device comprises a recycling box, wherein four corners of the bottom of the recycling box are fixedly connected with supporting legs, the bottom of the right side of the recycling box is communicated and fixed with a drain pipe, one end of the drain pipe is communicated and fixed with a valve, one side of the top of the recycling box is fixedly connected with a rectangular box with an opening on the left side, the top of the rectangular box is communicated and fixed with an inlet pipe, a rectangular box with an opening on the top and the bottom is sleeved in the rectangular box in a sealing and movable mode, a liquid outlet hopper is communicated and fixed on the bottom of the rectangular box, the bottom of the liquid outlet hopper extends into the recycling box, stop blocks are fixedly connected on inner walls on two sides of the rectangular box respectively, an upper filter screen and a lower filter screen are movably sleeved in the rectangular box, the bottom of the lower filter screen is movably contacted with the tops of the two stop blocks, T-shaped pull heads are fixedly connected on the tops of the upper filter screen and the lower filter screen respectively, and, go up the filter screen and fill between the filter screen down and have the active carbon granule filter material, the rectangular channel has been seted up in the left side of collection box, the left side bottom swing joint of rectangle box has the square pin, and the bottom of square pin runs through the below that the rectangular channel extended to the collection box and fixedly connected with steps on the piece, collection box and the equal slip cap of rectangular box are established on the square pin, fixed cover is equipped with the spacing ring that is located the rectangular channel on the square pin, and the same spring of fixedly connected with between the bottom of spacing ring and the bottom inner wall of rectangular channel, the spring movable sleeve is established on the square pin, establish to the toper structure on the top of square pin, the left side fixedly connected with U-shaped handle of rectangle box.
Preferably, the same rectangular ring groove is formed in the front side, the top, the rear side and the bottom of the rectangular box, a rectangular sealing ring is fixedly bonded in the rectangular ring groove, the outer side of the rectangular sealing ring is in movable contact with the inner wall of the rectangular box, and the rectangular sealing ring is located on the left of the inner space of the rectangular box.
Preferably, a first circular truncated cone-shaped hole is formed in the inner wall of the bottom of the rectangular box, a second circular truncated cone-shaped hole is formed in the top of the recycling box, the inner wall of the first circular truncated cone-shaped hole and the inner wall of the second circular truncated cone-shaped hole are fixedly connected with the outer side of the liquid outlet hopper, and the top of the liquid outlet hopper is flush with the inner wall of the bottom of the rectangular box.
Preferably, a round hole is formed in the inner wall of the top of the rectangular box, the side wall of the round hole is fixedly connected with the outer side of the inlet pipe, and the bottom end of the inlet pipe is flush with the inner wall of the top of the rectangular box.
Preferably, a first square hole is formed in the inner wall of the bottom of the rectangular box, and the inner wall of the first square hole is connected with the outer side of the square stop rod in a sliding mode.
Preferably, the top inner wall and the bottom inner wall of the rectangular groove are both provided with a second square hole, and the inner wall of the second square hole is in sliding connection with the outer side of the square stop lever.
Preferably, the treading block is positioned between the two legs on the left side, and one side of the top of the treading block is provided with an arc-shaped structure.
Compared with the prior art, the beneficial effects of the utility model are that:
through the matching of a recycling box, a rectangular box, a liquid outlet hopper, an inlet pipe, a rectangular box, a stop block, a lower filter screen, an upper filter screen, an active carbon particle filter material, a T-shaped pull head, a rectangular groove, a square stop rod, a tread block, a limit ring, a spring and a rectangular sealing ring with a U-shaped handle, sewage enters the rectangular box through the inlet pipe, the sewage downwards passes through the upper filter screen and enters the active carbon particle filter material to be adsorbed and purified by the active carbon particle filter material, the upper filter screen filters and shields and collects the particle impurities in the sewage at the top of the active carbon particle filter material, the adsorbed and purified water downwards passes through the lower filter screen and flows into the recycling box through the liquid outlet hopper, when the collected impurities need to be taken out for cleaning, the tread block is downwards pressed, the tread block downwards moves and drives the limit ring to downwards to compress the spring through the square stop rod, the square stop rod downwards separates from the left side of the rectangular box, the U-shaped handle can be pulled leftwards to drive the rectangular box to, at this moment, impurities can be poured out and cleaned or the upper filter screen is cleaned, when the activated carbon particle filter material is replaced, the T-shaped pull head located below is pulled to drive the lower filter screen and the activated carbon particle filter material at the top of the lower filter screen to move out, at this moment, the activated carbon particle filter material can be cleaned, the lower filter screen is placed into the rectangular box firstly to be contacted with the tops of the two stop blocks, new activated carbon particle filter material can be poured in, then the upper filter screen is placed, the rectangular box is inserted into the rectangular box rightwards, the treading pressure on the treading block is relaxed, at this moment, the spring in a compression state resets, and drives the direction stop rod to move upwards through the limiting ring to shield and limit the left side of the rectangular box, and the installation.
The utility model relates to a rationally, be convenient for to the particulate impurity in the sewage prefilter collect with take out fast, avoid particulate impurity to get into the active carbon granule filter material in, prolong the change cycle of active carbon granule filter material, and can be simple and convenient quick take off go up the filter screen and clear up or change active carbon granule filter material, labour saving and time saving is favorable to the use.
Drawings
FIG. 1 is a schematic structural view of a novel sewage treatment recycling device provided by the present invention;
FIG. 2 is a schematic view of a cross-sectional structure of a novel sewage treatment recycling device provided by the present invention;
FIG. 3 is an enlarged view of part A of FIG. 2;
fig. 4 is a schematic side view of the rectangular sealing ring of the novel sewage treatment recycling device.
In the figure: the device comprises a recovery box 1, a rectangular box 2, a liquid outlet hopper 3, a liquid inlet pipe 4, a rectangular box 5, a stop dog 6, a lower filter screen 7, an upper filter screen 8, an activated carbon particle filter material 9, a 10T-shaped pull head, a rectangular groove 11, a square stop lever 12, a step block 13, a limit ring 14, a spring 15, a rectangular sealing ring 16 and a U-shaped handle 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-4, a novel sewage treatment recycling device comprises a recycling box 1, wherein four corners of the bottom of the recycling box 1 are fixedly connected with supporting legs, the bottom of the right side of the recycling box 1 is communicated and fixed with a drain pipe, one end of the drain pipe is communicated and fixed with a valve, one side of the top of the recycling box 1 is fixedly connected with a rectangular box 2 with the left side provided with an opening, the top of the rectangular box 2 is communicated and fixed with an inlet pipe 4, a rectangular box 5 with the top and the bottom provided with openings is hermetically and movably sleeved in the rectangular box 2, the bottom of the rectangular box 2 is communicated and fixed with a liquid outlet hopper 3, the bottom of the liquid outlet hopper 3 extends into the recycling box 1, two inner walls of the rectangular box 5 are fixedly connected with stop blocks 6, an upper filter screen 8 and a lower filter screen 7 are movably sleeved in the rectangular box 5, the bottom of the lower filter screen 7 is movably contacted with the tops of the two stop blocks 6, the tops of the upper filter, the top of the T-shaped pull head 10 positioned at the lower part in the two T-shaped pull heads 10 is in movable contact with the bottom of the upper filter screen 8, the activated carbon granular filter material 9 is filled between the upper filter screen 8 and the lower filter screen 7, the left side of the recycling box 1 is provided with a rectangular groove 11, the left side bottom of the rectangular box 5 is in movable contact with a square stop lever 12, the bottom end of the square stop lever 12 penetrates through the rectangular groove 11 and extends to the lower part of the recycling box 1 and is fixedly connected with a pedal block 13, the recycling box 1 and the rectangular box 2 are sleeved on the square stop lever 12 in a sliding way, a limit ring 14 positioned in the rectangular groove 11 is fixedly sleeved on the square stop lever 12, the same spring 15 is fixedly connected between the bottom of the limit ring 14 and the inner wall of the bottom of the rectangular groove 11, the spring 15 is movably sleeved on the square stop lever 12, the top end of the square stop lever 12 is arranged in a conical structure, the, be convenient for filter in advance to the particle impurity in the sewage and collect and take out fast, avoid particle impurity to get into active carbon granule filter material 9 in, prolong active carbon granule filter material 9's change cycle, and can be simple and convenient quick take off go up filter screen 8 and clear up or change active carbon granule filter material 9, labour saving and time saving is favorable to the use.
In the utility model, the same rectangular ring groove is arranged at the front side, the top, the rear side and the bottom of the rectangular box 5, a rectangular sealing ring 16 is fixedly bonded in the rectangular ring groove, the outer side of the rectangular sealing ring 16 is movably contacted with the inner wall of the rectangular box 2, the rectangular sealing ring 16 is positioned at the left side of the inner space of the rectangular box 5, a first circular truncated cone-shaped hole is arranged on the inner wall at the bottom of the rectangular box 2, a second circular truncated cone-shaped hole is arranged at the top of the recycling box 1, the inner wall of the first circular truncated cone-shaped hole and the inner wall of the second circular truncated cone-shaped hole are both fixedly connected with the outer side of the liquid outlet hopper 3, the top of the liquid outlet hopper 3 is flush with the inner wall at the bottom of the rectangular box 2, a round hole is arranged on the inner wall at the top of the rectangular box 2, the side wall of the round hole is fixedly connected with the outer side of the inlet pipe 4, the bottom of the inlet pipe 4 is, all seted up the second square hole on the top inner wall of rectangular channel 11 and the bottom inner wall, and the inner wall in second square hole and the outside sliding connection of square pin 12, step on piece 13 and be located between two left landing legs, establish to the arc structure on one side of the top of step on piece 13, the utility model relates to a rationally, be convenient for filter in advance the collection and take out fast to the granular impurities in the sewage, avoid granular impurities to get into active carbon granule filter material 9 in, prolong the change cycle of active carbon granule filter material 9, and can be simple and convenient quick take off go up filter screen 8 and clear up or change active carbon granule filter material 9, labour saving and time saving is favorable to the use.
The working principle is as follows: when the device is used, sewage enters the rectangular box 5 through the inlet pipe 4, at the moment, the sewage downwards passes through the upper filter screen 8 and enters the activated carbon particle filter material 9, the upper filter screen 8 can filter particle impurities in the sewage, the particle impurities are shielded and collected at the top of the upper filter screen 8 in the rectangular box 5, the activated carbon particle filter material 9 adsorbs and purifies toxic substances in the sewage, the water after adsorption and purification downwards passes through the lower filter screen 7 and flows into the liquid outlet hopper 3, the water is guided into the recovery box 1 through the liquid outlet hopper 3, and the sewage is subjected to impurity filtering and adsorption and purification treatment, so that the sewage can be reused in aspects of flushing a toilet, watering and the like;
when the collected impurities need to be taken out for cleaning, the pedal block 13 can be directly stepped down by feet, under the stepping pressure, the pedal block 13 moves downwards and drives the square stop rod 12 to move downwards, the square stop rod 12 drives the limiting ring 14 to compress the spring 15 downwards, the square stop rod 12 is separated from the left side of the rectangular box 5 downwards, the U-shaped handle 17 can be pulled leftwards at the moment, the U-shaped handle 17 drives the rectangular box 5 to move leftwards, the T-shaped pull head 10 positioned above can be pulled upwards at the moment, the T-shaped pull head 10 positioned above drives the upper filter screen 8 to move upwards out of the rectangular box 5, the upper filter screen 8 drives the collected impurities to move outwards, and the impurities are poured out for cleaning or the upper filter screen 8 is cleaned;
when the active carbon particle filter material 9 is replaced, the T-shaped pull head 10 positioned below is pulled to drive the lower filter screen 7 and the active carbon particle filter material 9 at the top of the lower filter screen to move out, at the moment, the active carbon particle filter material 9 can be cleaned, the lower filter screen 7 is firstly placed into the rectangular box 2 to be contacted with the tops of the two stop blocks 6, the new active carbon particle filter material 9 can be poured in, and then the upper filter screen 8 is placed, when the device is installed, the treading block 13 is treaded downwards to compress the spring 15, then insert rectangle box 5 back to rectangle case 2 in the right side, relax and step on the pressure to step on piece 13, the spring 15 that is in compression state at this moment resets and drives direction pin 12 through spacing ring 14 and move back to reset that makes progress, and direction pin 12 shelters from the restriction to the left side of rectangle box 5 this moment, reaches the effect of fixed rectangle box 5, and the installation is accomplished, can take off fast and go up filter screen 8 and clear up or change active carbon granule filter material 9.
In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. A novel sewage treatment recycling device comprises a recycling box (1), wherein supporting legs are fixedly connected to four corners of the bottom of the recycling box (1), a drain pipe is communicated and fixed to the bottom of the right side of the recycling box (1), and a valve is fixed to one end of the drain pipe, the novel sewage treatment recycling device is characterized in that a rectangular box (2) with an opening arranged on the left side is fixedly connected to one side of the top of the recycling box (1), a feeding pipe (4) is communicated and fixed to the top of the rectangular box (2), a rectangular box (5) with an opening arranged at the top and the bottom is movably sleeved in the rectangular box (2), a liquid outlet hopper (3) is communicated and fixed to the bottom of the rectangular box (2), a stop block (6) is fixedly connected to inner walls of two sides of the rectangular box (5), an upper filter screen (8) and a lower filter screen (7) are movably sleeved in the rectangular box (5), the bottom of the lower filter screen (7) is in movable contact with the tops of the two stop blocks (6), the tops of the upper filter screen (8) and the lower filter screen (7) are both fixedly connected with T-shaped sliders (10), the top of the lower T-shaped slider (10) in the two T-shaped sliders (10) is in movable contact with the bottom of the upper filter screen (8), activated carbon particle filter materials (9) are filled between the upper filter screen (8) and the lower filter screen (7), the left side of the recovery box (1) is provided with a rectangular groove (11), the bottom of the left side of the rectangular box (5) is in movable contact with a square stop rod (12), the bottom end of the square stop rod (12) penetrates through the rectangular groove (11) and extends to the lower part of the recovery box (1) and is fixedly connected with a pedal block (13), the recovery box (1) and the rectangular box (2) are both slidably sleeved on the square stop rod (12), a limit ring (14) positioned in the rectangular groove (11) is fixedly sleeved on, and fixedly connected with same spring (15) between the bottom of spacing ring (14) and the bottom inner wall of rectangular channel (11), spring (15) activity cover is established on square pin (12), and the top of square pin (12) is established to the toper structure, the left side fixedly connected with U-shaped handle (17) of rectangular box (5).
2. The novel sewage treatment recycling device according to claim 1, wherein the rectangular ring grooves are formed in the front side, the top side, the rear side and the bottom of the rectangular box (5), rectangular sealing rings (16) are fixedly bonded in the rectangular ring grooves, the outer sides of the rectangular sealing rings (16) are movably contacted with the inner wall of the rectangular box (2), and the rectangular sealing rings (16) are located on the left side of the inner space of the rectangular box (5).
3. The novel sewage treatment recycling device according to claim 1, wherein a first circular truncated cone-shaped hole is formed in the inner wall of the bottom of the rectangular box (2), a second circular truncated cone-shaped hole is formed in the top of the recycling box (1), the inner wall of the first circular truncated cone-shaped hole and the inner wall of the second circular truncated cone-shaped hole are both fixedly connected with the outer side of the liquid outlet hopper (3), and the top of the liquid outlet hopper (3) is flush with the inner wall of the bottom of the rectangular box (2).
4. The novel sewage treatment recycling device according to claim 1, wherein a circular hole is formed in the top inner wall of the rectangular box (2), the side wall of the circular hole is fixedly connected with the outer side of the inlet pipe (4), and the bottom end of the inlet pipe (4) is flush with the top inner wall of the rectangular box (2).
5. The novel sewage treatment recycling device according to claim 1, wherein the inner wall of the bottom of the rectangular box (2) is provided with a first square hole, and the inner wall of the first square hole is slidably connected with the outer side of the square stop rod (12).
6. The novel sewage treatment recycling device according to claim 1, wherein the top inner wall and the bottom inner wall of the rectangular groove (11) are both provided with a second square hole, and the inner wall of the second square hole is slidably connected with the outer side of the square stop rod (12).
7. The novel sewage treatment recycling device according to claim 1, wherein the treading block (13) is located between two legs on the left side, and one side of the top of the treading block (13) is provided with an arc-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021617658.4U CN212799905U (en) | 2020-08-06 | 2020-08-06 | Novel sewage treatment recycle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021617658.4U CN212799905U (en) | 2020-08-06 | 2020-08-06 | Novel sewage treatment recycle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212799905U true CN212799905U (en) | 2021-03-26 |
Family
ID=75106548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021617658.4U Expired - Fee Related CN212799905U (en) | 2020-08-06 | 2020-08-06 | Novel sewage treatment recycle device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212799905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118026333A (en) * | 2024-03-29 | 2024-05-14 | 山东信世建筑安装有限公司 | Wastewater recycling system |
-
2020
- 2020-08-06 CN CN202021617658.4U patent/CN212799905U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118026333A (en) * | 2024-03-29 | 2024-05-14 | 山东信世建筑安装有限公司 | Wastewater recycling system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208586125U (en) | An oil-water separation system | |
| CN203307131U (en) | Hair sewage treating device | |
| CN104307238A (en) | Primary purified water treatment tank | |
| CN212799905U (en) | Novel sewage treatment recycle device | |
| CN212467293U (en) | Water environment is prosthetic and is used purifier | |
| CN216755609U (en) | Purifier for sewage treatment | |
| CN112900591B (en) | Construction pavement drainage equipment applied to construction site | |
| CN217677055U (en) | Rainwater collecting, purifying and storing device | |
| CN213375508U (en) | Sewage precipitation device for environmental protection engineering | |
| CN203618582U (en) | Fish and excrement separator | |
| CN206015855U (en) | A kind of rainwater flow-discarding device for sponge urban construction | |
| CN216516025U (en) | Device for collecting and purifying rainwater | |
| CN209237565U (en) | A new type of oil mist waste gas collection, treatment and purification equipment | |
| CN215975230U (en) | Water pollution sewage treatment device | |
| CN214889729U (en) | Municipal administration is with drainage pipe who has filtering capability | |
| CN215539427U (en) | Air purification device for waste plastic cracking recovery plant | |
| CN212534455U (en) | An environmentally friendly underground drainage pump station | |
| CN211367177U (en) | Glass fiber reinforced plastic oil separation tank | |
| CN208633208U (en) | Hand basin wastewater collection device | |
| CN219941922U (en) | Industrial water purifier capable of recycling waste water | |
| CN107524207A (en) | A kind of family domestic waste water regeneration device | |
| CN216038920U (en) | Family's drinking water filters processingequipment convenient to dismouting | |
| CN224113428U (en) | Purification device for plastic cleaning wastewater | |
| CN208065863U (en) | A kind of sewage-treatment plant of replaceable filter screen | |
| CN211435241U (en) | But cyclic utilization's family sewage header tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210326 |