CN100444990C - Method for repairing parts by using metal liquid to fill in interspaces in parts and application - Google Patents
Method for repairing parts by using metal liquid to fill in interspaces in parts and application Download PDFInfo
- Publication number
- CN100444990C CN100444990C CNB2004100268505A CN200410026850A CN100444990C CN 100444990 C CN100444990 C CN 100444990C CN B2004100268505 A CNB2004100268505 A CN B2004100268505A CN 200410026850 A CN200410026850 A CN 200410026850A CN 100444990 C CN100444990 C CN 100444990C
- Authority
- CN
- China
- Prior art keywords
- metal
- fusing point
- fluid
- space
- relatively low
- 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
Abstract
The present invention provides a method for repairing a component by using metal fluid to fill the inner gap of the component, which comprises the following steps and technical conditions: a material component with a relative higher melting point to be repaired is partially or entirely immersed in the metal material fluid with a relative lower melting point, and thus, the metal material fluid with a relative lower melting point flows into the gap communicated with the surface of the material component with a relative higher melting point. The material component with a relative higher melting point is in a solid state in the process. The method can be used for repairing casting components with surface defects, metal machinery components with surface defects of fatigue cracks generated in a using process, etc., or the workpiece made from non-metal material with the gap communicated with the surface. The present invention has the advantages of simple operation, convenient control, good function and effect, wide applying range and good market prospect.
Description
Technical field
The present invention relates to the part recovery technique, particularly metal fluid is filled the method and the application thereof of part internal pore rebuild part.
Background technology
Foundry goods during mechanical industry is produced, die casting, weldment, sintered part etc., owing to have aperture, sand holes and minute crack, and some defective and influence the quality and the use of part greatly.Traditional way is defective part is done over again or to scrap, and causes great waste.The vacuum infiltration method is a kind ofly liquid impregnant is infiltrated with the adding pressure type vacuum and to fill the method that seals among various micropores and the space with reinforcement, utilizes this method that the quality of above-mentioned defective engineering goods and yield rate are improved.The vacuum infiltration method also is applicable to the object of many kinds of nonmetallic materials, in recent years especially in automobile, motorcycle, motor boat etc. are produced, to its engine cylinder-body, compressor casing and various die casting than extensive use the vacuum infiltration processing.Thereby, improve yield rate, optimal design significantly, alleviate finished weight, improve the quality of products and aspect such as simplified processing process obtains significant benefit.The vacuum infiltration technology is extensively admitted by mechanical production division as the effective way of the leakproof reinforcement of engineering goods.The general technology flow process of vacuum pressed method of impregnation is (reference " vacuum infiltration technology and application thereof ", casting, the fifth phase in 1996, P30～32): (1) will put into the infiltration jar through oil removing and dry part; (2) the infiltration jar vacuumizes; (3) with impregnant in basin input infiltration jar and flood and cover part, keep vacuum; (4) remove vacuum gradually to normal pressure, add to certain pressure with compressed air again, force impregnant to infiltrate the part hole; (5) release, impregnant is put back to basin, the centrifugal too much impregnant that gets rid of the part surface of zero-suppressing; (6) transfer parts is in cleaning sink, from the logical people's air bubble of bottom of gullet and about (about) rotational parts; (7) parts transfer that cleans up enters to solidify impregnant is solidified.
The impregnant that existing vacuum infiltration method adopts mainly contains the impregnant and the methacrylic acid impregnant three major types such as (mainly containing anaerobic curing type and thermohardening type) of waterglass impregnant, unsaturated polyester (UP) representative.The aqueous solution that the water glass type impregnant is made up of sodium metasilicate, advantage such as have that cost is low, infiltration process is simple, toxicity is supported, particularly heat resistance is good, but shortcoming is to contain big water gaging in the impregnant, solidify slow and solidify that post-shrinkage ratio is big, yield rate is lower, and not too is suitable for the less part of hole.The impregnant (reality also comprises type impregnants such as many unsaturated compounds and epoxy resin) of unsaturated polyester (UP) representative is the impregnant that synthetic resin is formed, except that the impregnant that some unsaturated compound is formed, owing to the taller and bigger reason of viscosity, often will apply higher pressure infiltrates, perhaps to add people's diluent, many in the diluent is the big and higher compounds of volatility of toxicity, environmental protection and safety, infiltration yield rate are all brought adverse influence, therefore replaced gradually by the methacrylate type impregnant in many aspects.The methacrylate impregnant since the seventies in 20th century just by than extensive use, in many production technologies of mechanical industry, progressively replace the impregnant of other types, and become a class impregnant that attracts most attention in the current vacuum-impregnator and application prospect is arranged most.Application number is that 01130100.7 Chinese invention patent application discloses a kind of " sealing reinforcement methacrylate type vacuum-impregnator ", include methacrylate monomers, initator, polymerization inhibitor, wherein add on a small quantity by with the dialkylene compound of single phenyl ring and the combination crosslinking agent that methacrylate combined of other kind; This impregnant is when both meeting low viscosity and requiring, and heat resistance increases, but the highlyest also can only tolerate 180 ℃.Present methacrylate type impregnant, mainly be divided into two kinds of normal temperature cure (anaerobic) and heat cures from the principle of solidification, common feature is that viscosity is low, can be fit to the infiltration of micro-pore, and toxicity is low, do not contain volatile matter, cause environmental pollution with the washings discharge but in the washing process of operation, still have a small amount of organic matter; In addition, it is lower that the anaerobic type normal temperature cure has energy consumption, the yield rate advantage of higher, but have shortcomings such as impregnant price height and infiltration equipment complexity.
In addition, application number is that 02104351 Chinese invention patent application discloses a kind of " molten metal filling and repairing technology ", its repairing principle is to utilize adjustable big electric current (190～4200A) at short notice (in 0.5～2.5s) Metal Ball of different size or rod fusing and pressure welding to be filled in the injury region of part or die surface, to make between repair welding material and matrix material to reach metallurgical binding; This technology is applicable to local repairings such as sand holes, wearing and tearing and the avalanche position of metal parts and die surface, its shortcoming is that defective is repaired one by one, the situation of mending takes place to leak easily, the part more for defective can not be suitable for well, and relatively poor for the defective of relatively going deep into piece surface (as surface opening, internal cavities is big) repair efficiency, production efficiency is low, labour intensity is big, and needs special equipment, and processing cost is higher.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, provide a kind of simple to operate, control is convenient, be fit to produce in enormous quantities the defective in the comprehensive rebuild part of using of energy, thereby the metal fluid that prolongs the service life of part or reduce the part scrappage is filled the method for part internal pore rebuild part.
Another object of the present invention is to provide a kind of application of said method.
Purpose of the present invention is achieved through the following technical solutions: the method that this metal fluid is filled part internal pore rebuild part comprises the steps and process conditions: will need the relative higher material parts of fusing point repaired local or all be immersed in the fluid of the relatively low metal material of fusing point, and the fluid of the relatively low metal material of fusing point be entered on the higher relatively material parts of fusing point communicate in the space of piece surface; The higher relatively material parts of fusing point remains solid in aforementioned process.
Described liquid metal material is a metal liquid.
Described metal can be simple metal, alloy or metallic composite.
This method process more specifically can be: the liquid infiltration of the metal material that fusing point is relatively low enters on the higher relatively material parts of fusing point and communicates in the space of piece surface, metal liquid in the space that enters part is solidified, and be filled in the part space.
This method process more specifically also can be: the liquid infiltration of the metal material that fusing point is relatively low enters on the higher relatively material parts of fusing point and communicates in the space of piece surface, metal liquid in the space that enters part is cooled to after the semisolid, will from semi-solid metal, be taken out by the infiltration part.
This method also can be got rid of gas in the space on the part earlier by the method that vacuumizes, the fluid of the relatively low metal material of fusing point is entered on the higher relatively material parts of fusing point communicate in the space of piece surface.
This method also can be in that the fluid of relatively low metal material be pressed on the higher relatively material parts of fusing point and communicates in the space of piece surface with fusing point under the effect of compression.
The effect of described compression can act on the surface of the relatively low metal material fluid of fusing point by making gas pressure, the fluid of the relatively low metal material of fusing point is entered on the higher relatively material parts of fusing point communicate in the space of piece surface; Also can adopt head that the relatively low metal material flow surface of fusing point is exerted pressure.
This method can be applicable to repair the surface to be had the foundry goods of defective or has in use produced the metal machine components of blemish such as fatigue crack or had the workpiece that communicates and form in the nonmetallic materials manufacturing of surface void, as pottery or composite etc.
The present invention has following advantage and effect with respect to prior art:
(1) action effect is good; The inventive method utilizes the operation principle that fluid flows naturally to carry out the repair process of part, as long as there is the depression defect that is connected with the surface at piece surface, regardless of its shape, size, all can all repair, and be packed into repair materials in the defective can be fully, equably defective is filled up, avoided the hollow situation that adopts prior art to occur; Because the repair materials that this method adopts is a metal material, its fusing point is higher relatively, except that the space of filling up in part can prevent part gas leakage, the leakage, play effect simultaneously with the defective seam, significantly improve the mechanical performance of part, and can tolerate higher temperature, overcome the shortcoming of existing vacuum infiltration method heat resistance difference, the part applicability of being repaired is better, and this method has also avoided adopting existing impregnant pollution on the environment.
(2) simple to operate, control convenience; The processing step that this method realizes is very simple, operates more conveniently, also is easy to control its process, can carry out part or whole processing neatly according to what of part defect, and not need other design specialized equipment, thereby have the production efficiency height, labour intensity is little, the advantage that processing cost is low.
(3) applied widely; The present invention can be used for eliminating common casting flaws such as shrinkage porosite, shrinkage cavity, the fatigue crack that also can rebuild part produces in use prolongs service life of part, can also repair to have bigger foundry goods of flaw size or machine components, range of application is wider, good market prospect.
Description of drawings
Fig. 1 is the technical process schematic diagram of the embodiment of the invention 1.
The specific embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment 1
The aluminum casting 1 that at first will have microvoid 2, shown in Fig. 1 (a), oil removing cleaning and dry; Then aluminum casting 1 is placed in and adopts in the hanging basket 3 that heat resisting steel makes, hanging basket 3 adopts cross bars 4 that aluminum casting 1 is pushed down, emersion liquid level (shown in Fig. 1 (b)) when preventing that aluminum casting 1 is immersed in the infiltration liquid; Then hanging basket 3 is put into the infiltration groove 6 that adopts heat resisting steel to make, with cushion block 8 pads under hanging basket 3, so that infiltration liquid can enter aluminum casting 1 from the infiltration of aluminum casting 1 bottom, and with the fixing hanging basket 3 (shown in Fig. 1 (c)) of cross bar 7; The spelter material 9 that will be used to melt infiltration places in the infiltration groove 6 (shown in Fig. 1 (d)); The infiltration groove 6 that aluminum casting 1 and spelter material 9 are housed is put into heating furnace 10 (shown in Fig. 1 (e)), open vacuum control valve 11, starting vavuum pump vacuumizes in the stove, reach the vacuum of 5Pa, and connect material heating in 12 pairs of stoves of power supply heater, in the stove design temperature be 480 ℃ (after the airtight fire door of heating furnace, can be to vacuumizing in the stove, also can in stove, inflate, bear certain air pressure); After zinc ingot metal material 9 fusings in the infiltration groove 6, aluminum casting 1 is surrounded (shown in Fig. 1 (f)) by zinc liquid 14, reaches 480 ℃ in the stove, and insulation stops to vacuumize, and closes vacuum pipe valve 11; Open charge valve 13 then, inflate in stove, carry out pressurize (shown in Fig. 1 (g)) after reaching the air pressure 1.2MPa of setting, air pressure enters among the microvoid 2 of aluminum casting 1 infiltration around the aluminum casting 1 of zinc liquid; And heat-insulation pressure keeping, after infiltration process finishes, unload the loss of sheet internal gas pressure, the groove 6 that will infiltrate takes out in stove, lifting rope 15 is hung on the suspension hook 5, hanging basket 3 is hung out (shown in Fig. 1 (h)) from infiltration groove 6, the infiltration liquid in the hanging basket 3 can flow out and enter among the infiltration groove 6, and zinc liquid unnecessary on the aluminum casting 1 is removed; Infiltration enters after zinc liquid solidifies in cooling procedure in the microvoid 2 of aluminum casting 1, the intact part (shown in Fig. 1 (i)) that has promptly obtained to repair.
Embodiment 2
Present embodiment except that following technical characterictic with embodiment 1: space 2 sizes on the foundry goods 1 are bigger, after zinc liquid infiltration enters in the space 2, flow out from space 2 for preventing zinc liquid, and zinc liquid is cooled to after the semisolid, foundry goods 1 taken out from infiltration groove 6 again.
Embodiment 3
Present embodiment except that following technical characterictic with embodiment 1: by the part that infiltrated is the part that has produced tired face crack in the use.Infiltration enters liquid metals in the crackle fatigue crack on the part that has been equivalent to seam after solidifying, and can reduce FATIGUE CRACK GROWTH speed, eliminates the fatigue that part produces, thereby prolongs the service life of part.Present embodiment is suitable for the rotating shaft of high-rating generator or the part on the import main equipment, owing to manufacturing or import substitution part price are very expensive again, adopts the present invention to reduce production costs significantly.
Embodiment 4
Present embodiment except that following technical characterictic with embodiment 1: by the part that infiltrated is the large-scale sheet metal deep drawing mould that sand casting forms, mold materials is Cr12, because casting dimension is very big, can form casting flaws such as crackle, shrinkage porosite, shrinkage cavity unavoidably in the casting process, can't use as normal mould.Present embodiment does not adopt hanging basket shown in the embodiment 1, the mould of casting directly can be placed the infiltration groove to carry out embodiment 1 described process, eliminate on the casting mould communicating, promptly can be used for producing after adopting hand-operated tools to repair a die again to reach mould requirement size in the void defects on surface.And adopt traditional machining process to produce the mould of this type, when die size was very big, requirement will have very big process equipment; Because the material of mould itself is the high-abrasive material formation, and very big to tool wear during machining, simultaneously, long processing time produces a large amount of metal fillings, the waste raw material and the energy are so the cycle of new product development is long, cost is high again.Adopt casting in conjunction with the present invention, then can shorten the construction cycle of new product significantly, effectively reduce the development cost of new product.
Embodiment 5
Present embodiment except that following technical characterictic with embodiment 1: by the part that infiltrated is the large-scale sheet metal deep drawing mould that sand casting forms, mold materials is aluminium alloy and the synthetic cermet of alundum (Al, because casting dimension is very big, can form casting flaws such as crackle, shrinkage porosite, shrinkage cavity unavoidably in the casting process, can't normally use as mould.Present embodiment need not hanging basket shown in the embodiment 1, the mould of casting directly can be placed the infiltration groove to carry out embodiment 1 described process.
Embodiment 6
Present embodiment is substantially the same manner as Example 1, and difference is that the part that is infiltrated is the ceramic member with face crack.
Claims (8)
1, a kind of metal fluid is filled the method for part internal pore rebuild part, it is characterized in that comprising the steps and process conditions: will need the relative higher material parts of the fusing point repaired local or all be immersed in the relatively low metal liquid of fusing point, and the relatively low metal liquid of fusing point be entered on the higher relatively material parts of fusing point communicate in the space of piece surface; The higher relatively material parts of fusing point remains solid in aforementioned process.
2, metal fluid according to claim 1 is filled the method for part internal pore rebuild part, and it is characterized in that: described metal is simple metal, alloy or metallic composite.
3, metal fluid according to claim 1 is filled the method for part internal pore rebuild part, and it is characterized in that: described liquid metal material is the semi-solid metal with thixotropic flow behavior.
4, metal fluid according to claim 1 is filled the method for part internal pore rebuild part, it is characterized in that: the liquid infiltration of the metal material that fusing point is relatively low enters on the higher relatively material parts of fusing point and communicates in the space of piece surface, metal liquid in the space that enters part is cooled to after the semisolid, will from semi-solid metal, be taken out by the infiltration part.
5, fill the method for part internal pore rebuild part according to each described metal fluid of claim 1～4, it is characterized in that: enter on the higher relatively material parts of fusing point at the fluid of the relatively low metal material of fusing point and communicated before the space of piece surface, get rid of gas in the space on the part earlier by the method that vacuumizes.
6, fill the method for part internal pore rebuild part according to each described metal fluid of claim 1～4, it is characterized in that: in that the fluid of relatively low metal material is pressed on the higher relatively material parts of fusing point and communicates in the space of piece surface with fusing point under the effect of compression.
7, metal fluid according to claim 6 is filled the method for part internal pore rebuild part, it is characterized in that: described action of compressive stress is to utilize gas pressure to act on the surface of the relatively low metal material fluid of fusing point, the fluid of the relatively low metal material of fusing point is entered on the higher relatively material parts of fusing point communicate in the space of piece surface.
8, fill the application of the method for part internal pore rebuild part according to each described metal fluid of claim 1～7, it is characterized in that: be used to repair the surface and have the foundry goods of defective or in use produced the metal machine components of blemish or had the workpiece that communicates and form in the nonmetallic materials manufacturing of surface void.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100268505A CN100444990C (en) | 2004-04-13 | 2004-04-13 | Method for repairing parts by using metal liquid to fill in interspaces in parts and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100268505A CN100444990C (en) | 2004-04-13 | 2004-04-13 | Method for repairing parts by using metal liquid to fill in interspaces in parts and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1562529A CN1562529A (en) | 2005-01-12 |
| CN100444990C true CN100444990C (en) | 2008-12-24 |
Family
ID=34480766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100268505A Expired - Fee Related CN100444990C (en) | 2004-04-13 | 2004-04-13 | Method for repairing parts by using metal liquid to fill in interspaces in parts and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100444990C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108450A (en) * | 2015-07-31 | 2015-12-02 | 安徽省中力车辆制动系统制造有限公司 | Production process of brake pad |
| CN113601103B (en) * | 2021-06-25 | 2022-10-14 | 上海航天精密机械研究所 | Method for repairing loose defect of aluminum and magnesium alloy casting |
| CN115156837A (en) * | 2022-07-29 | 2022-10-11 | 中国航发沈阳发动机研究所 | Hot isostatic pressing repair method for surface communication defects of aluminum alloy casting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168736A (en) * | 1975-12-04 | 1979-09-25 | Goricon Metallurgical Services Limited | A method of repairing ferrous metal bodies |
| US4807688A (en) * | 1985-04-08 | 1989-02-28 | Beetle Robert H | Submerged casting |
| CN1100356A (en) * | 1994-07-29 | 1995-03-22 | 中国人民解放军装甲兵工程学院 | Repairing method for tools and dies and repairing machine |
| CN2195999Y (en) * | 1994-07-29 | 1995-05-03 | 中国人民解放军装甲兵工程学院 | Machine for repairing tool and die |
| US6283356B1 (en) * | 1999-05-28 | 2001-09-04 | General Electric Company | Repair of a recess in an article surface |
| CN1442255A (en) * | 2002-03-05 | 2003-09-17 | 北京天工宇工贸有限公司 | Molten metal filling and repairing technology |
-
2004
- 2004-04-13 CN CNB2004100268505A patent/CN100444990C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168736A (en) * | 1975-12-04 | 1979-09-25 | Goricon Metallurgical Services Limited | A method of repairing ferrous metal bodies |
| US4807688A (en) * | 1985-04-08 | 1989-02-28 | Beetle Robert H | Submerged casting |
| CN1100356A (en) * | 1994-07-29 | 1995-03-22 | 中国人民解放军装甲兵工程学院 | Repairing method for tools and dies and repairing machine |
| CN2195999Y (en) * | 1994-07-29 | 1995-05-03 | 中国人民解放军装甲兵工程学院 | Machine for repairing tool and die |
| US6283356B1 (en) * | 1999-05-28 | 2001-09-04 | General Electric Company | Repair of a recess in an article surface |
| CN1442255A (en) * | 2002-03-05 | 2003-09-17 | 北京天工宇工贸有限公司 | Molten metal filling and repairing technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1562529A (en) | 2005-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101837444B (en) | High manganese steel Sic ceramic particles composite preparation method | |
| CN102294435B (en) | Method for casting and producing shot blasting machine blade based on firing mold on composite shell with utilization of chilled surface layer paint | |
| CN104550876A (en) | Pressurizing casting device and method for automobile hub | |
| CN102240860A (en) | Method and equipment for manufacturing gradient material mould | |
| CN109112444B (en) | A kind of silicon carbide whisker reinforced aluminum matrix composites isothermal multiway forging method | |
| CN106966569A (en) | A kind of castingin imitates the Glass Mould of Alloy Cast Iron and its manufacture method of type nickel core | |
| CN106378456A (en) | Rapid densifying method for powder high-temperature alloy component | |
| CN101185963A (en) | Vanishing mould casting technique of blast furnace cooling wall | |
| CN106001450A (en) | Cylinder sleeve casting technology | |
| CN101417329A (en) | Method with lost foam casting process production blast furnace water-cooling wall | |
| CN1199659A (en) | Casting mould and method for manufacturing metallic hollow castings and hollow castings | |
| CN100444990C (en) | Method for repairing parts by using metal liquid to fill in interspaces in parts and application | |
| CN202984580U (en) | Cylinder cover casting die | |
| CN207480859U (en) | Graphite crucible static pressure is sintered easy mold release mold | |
| CN100540178C (en) | Utilize envelope core integral mould to make the method for foundry goods | |
| CN201164900Y (en) | Composite metal mould | |
| CN100337775C (en) | Method for producing large-sized blank of wrought magnesium alloys | |
| CN112517890A (en) | Manufacturing process of motorcycle shock absorber aluminum cylinder | |
| CN103934427B (en) | A kind of centre spinning method of asymmetric ring-type high-lead bronze foundry goods | |
| CN103506595A (en) | Die-casting technology of hypereutectic aluminum alloy clutch gear | |
| CN103878318B (en) | A kind of cylinder cap casting die and casting method | |
| CN207480858U (en) | Graphite crucible static pressure is sintered easy mold release mold | |
| CN105798271A (en) | Automobile mold casting cast by compounding ductile iron and gray iron, gating system and casting method | |
| US9352387B2 (en) | Method and plant for manufacturing light alloy castings by injection die casting with non-metallic cores | |
| CN104609871A (en) | Composite rotor for refining and degassing of molten aluminum and preparation method of composite rotor |
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: Zhaoqing Honda Foundry Co., Ltd. Assignor: Zhou Zhaoyao Contract fulfillment period: 2008.12.30 to 2013.12.29 contract change Contract record no.: 2009440000713 Denomination of invention: Method for repairing parts by using metal liquid to fill in interspaces in parts and application Granted publication date: 20081224 License type: Exclusive license Record date: 2009.7.20 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.30 TO 2013.12.29; CHANGE OF CONTRACT Name of requester: ZHAOQING HONDA TATSUYA METAL CO., LTD. Effective date: 20090720 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081224 Termination date: 20140413 |