CN201023809Y - Unscrewing-invalidating false-proof bottle cap with wireless radio frequency identification label - Google Patents
Unscrewing-invalidating false-proof bottle cap with wireless radio frequency identification label Download PDFInfo
- Publication number
- CN201023809Y CN201023809Y CNU2007200692972U CN200720069297U CN201023809Y CN 201023809 Y CN201023809 Y CN 201023809Y CN U2007200692972 U CNU2007200692972 U CN U2007200692972U CN 200720069297 U CN200720069297 U CN 200720069297U CN 201023809 Y CN201023809 Y CN 201023809Y
- Authority
- CN
- China
- Prior art keywords
- radio frequency
- frequency identification
- wireless radio
- top cover
- identification mark
- 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 - Lifetime
Links
Images
Landscapes
- Closures For Containers (AREA)
Abstract
The utility model pertains to the application field of anti-counterfeiting technologies and relates to an anti-counterfeiting bottle cover which is invalid after being opened and is provided with a wireless radio frequency identification tag, the utility model includes a top cover, the wireless radio frequency identification tag and a sealing plate, a taper table-shaped sealing plug which is protrudent downward and can be inosculated with the inner wall of a bottle mouth are arranged on the sealing plate, the inner edge of the top cover is provided with an undercut, the edge of the sealing plate is embedded in the top cover by the undercut, the wireless radio frequency identification tag is arranged between the sealing plate and the top cover in the top cover, when the bottle cover is screwed tightly, the sealing plate can rotate with the top cover under the driving of the top cover, and when being opened, the sealing plate can maintain a still position relative to the bottle mouth. The utility model can damage the wireless radio frequency identification tag during the opening of the bottle cover, so the utility model is invalid, and the utility model can prevent the wireless radio frequency identification tag being transferred for reuse.
Description
Technical field
The utility model belongs to the application of anti-counterfeiting technology, relate to a kind of anti-fake bottle lid, specifically a kind of anti-fake bottle lid that has wireless radio frequency identification mark of outwarding winding and losing efficacy, can make when outwarding winding bottle cap that wireless radio frequency identification mark is destroyed to cause inefficacy, and stop wireless radio frequency identification mark and be transferred and re-use.
Background technology
At present, fraud manufacturer constantly is further intensified on imitation technology and means under the ordering about of interests, even has formed the production model of specialization, grouping of the world economy, systematization, networking, makes hard to guard against, its evil extremely of user.Simultaneously, therefore legal production firm and enterprise have also suffered tremendous loss, and its product and brand image will be subjected to serious destruction.In order to hit personation manufacturer, protection distributor, to improve client's loyalty, enterprise needs perfect product false proof, identification and the follow-up system of a cover.
Radio frequency identification (RFID) technology is a kind of non-contacting automatic identification technology.The simplest system is that radio frequency identification (RFID) label and read write line are formed.Can realize non-contactly that multiple goal remote, motion reads and writes.This technology is because the storage content of its chip is big, and information stability is read and write easy; And the UID sign indicating number whole world of chip is unique, and counterfeit cost is high.Can be in fact with the all-the-way tracking in the existing circulation of commodities.The customer was by the special-purpose means of identification characteristics of the identity of recognition value easily, and this technology obtained the fast speed development later in 2000, and potentiality have a wide range of applications in fields such as warehouse logistics, product false proof, products in circulation and product maintenance trackings.
Simultaneously, it is base material production that RFID label in the market adopts paper or mylar more, and this has just given the lawless person with opportunity, and it is affixed on behind the product surface can be by the certain physics chemical means with its complete peeling off with affixed object, and is used again.And the plastic bottle closure that generally uses is because technology is universal, with low cost; The fake producer comes out with regard to reproducible with seldom input.According to relevant Patent data introduction, the false proof research that combines with bottle cap for the RFID label early has and relates to.As the ejecting type bottle cap (patent No. ZL200420060583.9) of outwarding winding, ejecting and destroy bottle cap and realize easily, but be connected very tinyly by top portion with main body, the RFID antenna is difficult to accomplish this part.Another part Antenna extender is damaged RFID label (patent No. ZL200520064539.X) to easily ruining the district by external force, and operation is a lot, must make by hand again, is difficult to accomplish automated production.Do not see application example yet.
Summary of the invention
Thereby technical problem to be solved in the utility model provides a kind of can destruction the physical structure of wireless radio frequency identification mark by the power of outwarding winding reaches the anti-fraud functional anti-fake bottle lid that has wireless radio frequency identification mark, to overcome the above-mentioned defective that prior art exists.
The technical scheme of the utility model technical solution problem is as follows:
A kind of anti-fake bottle lid that has wireless radio frequency identification mark of outwarding winding and losing efficacy, comprise top cover, wireless radio frequency identification mark, described wireless radio frequency identification mark comprises matrix and is arranged on matrix interior chip and antenna, it is characterized in that, also comprise seal disc, the frustum sealing plug that seal disc is provided with downward protrusion and can matches with the bottle neck inwall, described top cover inner edge is provided with back-off, described seal disc edge is embedded in top cover by back-off, it is interior between seal disc and top cover that described wireless radio frequency identification mark is arranged on top cover, seal disc can rotate with top cover under the drive of top cover during described bottle cap screwing, and the relative bottle neck of seal disc is motionless when outwarding winding.
By above disclosed technical scheme as can be known, the utility model is with between wireless radio frequency identification mark setting and top cover and the seal disc, being with seal disc when top cover when bottle neck screws rotates, seal disc is subjected to top cover pressure and to the bottle neck jam-pack, on the one hand owing to push generation to the lateral pressure of bottle neck side such as F1, the F2 of Fig. 2, top cover pressure makes seal disc generation deformation on the other hand, bottle neck is produced F3, the F4 of diagonal compression such as Fig. 2, by the mechanics rule as can be known pressure F be decomposed into F3, F4 component (shown in Fig. 2 a and Fig. 2 b) greater than self; Thereby make bottle neck obtain bigger pressure.When outwarding winding top cover, the genus face contacts and can to obtain friction force bigger between seal disc and bottle neck, and it is less to belong to the some contact friction force between seal disc and top cover; The relative seal disc of top cover screws out bottle neck, and top cover has enough surplus energy to destroy the physical structure of mediate wireless radio frequency identification mark (RFID label) during this.At last will seal dribbling from bottle neck by the back-off of top cover.
The utility model has not only been stopped wireless radio frequency identification mark (RFID label) and has been repeated to use, and has strengthened the sealing function of bottle cap.
Description of drawings
Below in conjunction with accompanying drawing the utility model false proof device is further specified:
Fig. 1 is example structure scheme drawing of the utility model anti-fake bottle lid;
Fig. 2 is a bottle neck force analysis scheme drawing when screwing;
Fig. 2 a is the decomposing schematic representation of top cover pressure;
Fig. 2 b is the stressed synthetic scheme drawing of bottle neck;
Fig. 3 is the A-A sectional structure chart of top cover among Fig. 1;
Fig. 4 is a wireless radio frequency identification mark birds-eye view among Fig. 1;
Fig. 5 is a seal disc birds-eye view among Fig. 1;
Fig. 6 screws scheme drawing for top cover drives seal disc;
Fig. 7 is another example structure scheme drawing of the utility model anti-fake bottle lid;
Fig. 8 is a wireless radio frequency identification mark birds-eye view among Fig. 7;
Fig. 9 is improved type osed top RFID label construction figure;
The specific embodiment
Further specify the utility model below in conjunction with accompanying drawing.
As Fig. 1 and shown in Figure 6, the anti-fake bottle lid that has wireless radio frequency identification mark that the utility model is outwarded winding and lost efficacy, comprise top cover 1, wireless radio frequency identification mark 2, described wireless radio frequency identification mark 2 comprises matrix 201 and is arranged on chip 202 and antenna 203 in the matrix 201, also comprise seal disc 3, the frustum sealing plug 301 that seal disc is provided with downward protrusion and can matches with bottle neck 4 inwalls, described top cover 1 inner edge is provided with back-off 101, described seal disc 3 edges are embedded in top cover by back-off 101, it is interior between seal disc 3 and top cover 1 that described wireless radio frequency identification mark 2 is arranged on top cover 1, seal disc 3 can rotate with top cover 1 under the drive of top cover 1 during described bottle cap screwing, and seal disc 3 relative bottle necks 4 are motionless when outwarding winding.
The damage type of the utility model wireless radio frequency identification mark mainly contains two kinds, can also can be tearing mode for breaking type.
Embodiment is depicted as the type of breaking among Fig. 1, Fig. 3～Fig. 6, be provided with at least two of stretching out in the described top cover downwards and scrape pin 103, described seal disc 3 is provided with circular arc type slot scraping 302, be provided with through hole 204 corresponding to the wireless radio frequency identification mark 2 of scraping pin 103 places, the described pin 103 of scraping passes through hole 204 and is deep in the slot scraping 302, and described radio frequency identification mark 2 is signed and is fixed on the seal disc 3.
As shown in Figure 5, described slot scraping 302 ends are provided with stop mouth 303, and the described initial position of scraping pin 103 is arranged on stop mouth 303 places.
During bottle cap screwing, top cover can drive seal disc by dual mode and rotate, and can at the edge of described seal disc 3 dop 304 be set for as shown in Figure 6, corresponding top cover 1 inwall is provided with block 102, and the dop 304 of seal disc rotates with top cover 1 under the drive of block 102 during bottle cap screwing.Also can directly drive stop mouth 303 rotations of seal disc 3 by scraping pin 103, thereby realize that top cover 1 drives the rotation of seal disc 3 for shown in Figure 5.
The anti-fake bottle lid of this kind damage type, owing to scrape stop mouth 303 places that pin 103 is stuck in seal disc 3 at first, no certain external force can not destroyed wireless radio frequency identification mark (RFID label) because of rotation.Top cover 1 is scraped pin 103 and is entered disengaging stop mouth 303 in the slot scraping 302 when bottle neck 4 screws, scrape the pressure that pin 103 has also strengthened 3 pairs of bottle necks 4 of seal disc; When outwarding winding top cover 1,, scrape pin 103 seal disc 3 slips relatively in slot scraping 302, thereby scrape to the RFID label its damage inactivation because seal disc 3 relative bottle necks are static.
Fig. 7～Fig. 8 is the tearing mode anti-fake bottle lid.The matrix border of described wireless radio frequency identification mark is provided with tearing port 205, and the upper and lower surface of the matrix 201 of wireless radio frequency identification mark fixes with top cover 1 lower surface and seal disc 3 upper surfaces respectively.The upper surface of described tearing port 205 place's matrix lower surfaces and seal disc 3 fixes, and the upper surface and top cover 1 lower surface of matrix 201 centre portions of described wireless radio frequency identification mark are fixedly connected.Damage for increasing effect, wireless radio frequency identification mark 2 can be extended outward along tearing port 205 and tear 206, preferably antenna 203 or chip 202 are distributed to and tear 206, the described upper surface of tearing 206 lower surface and seal disc 3 fixes.RFID label and top cover and seal disc can be fixed by jointing material or other modes.
Top cover 1 can drive seal disc 3 spinning bottle necks together during use when bottle neck 4 screws, when outwarding winding top cover 1 since seal disc 3 relative bottle necks 4 be static, when rotating, top cover 1 is being with RFID tag hub district to rotate, in other words seal disc 3 is being with and is being torn 206 and will begin to have torn to pieces the RFID label from tearing port 205, and then reaches RFID label damage inactivation purpose.The lower surface of tearing port place body upper surface and top cover is fixed, and the lower surface and the seal disc upper surface of the matrix centre portion of described wireless radio frequency identification mark are fixedly connected, and the lower surface of tearing a upper surface and top cover fixes.The mode that both destroy is identical.
The utility model can further be modified into osed top RFID label, as shown in Figure 9, is embedded in traditional bottle cap inside by the entire RF ID label with top cover and seal disc, forms anti-counterfeit structure, makes injection moulding or other inserts purposes.
Claims (9)
1. anti-fake bottle lid that has wireless radio frequency identification mark of outwarding winding and losing efficacy, comprise top cover (1), wireless radio frequency identification mark (2), described wireless radio frequency identification mark (2) comprises matrix (201) and is arranged on matrix (201) interior chip (202) and antenna (203), it is characterized in that, also comprise seal disc (3), the frustum sealing plug (301) that seal disc (3) is provided with downward protrusion and can matches with bottle neck (4) inwall, described top cover (1) inner edge is provided with back-off (101), described seal disc (3) edge is embedded in top cover (1) by back-off (101), described wireless radio frequency identification mark (2) is arranged on and is positioned in the top cover (1) between seal disc (3) and the top cover (1), seal disc (3) can rotate with top cover (1) under the drive of top cover (1) during described bottle cap screwing, and bottle neck (4) is motionless relatively for seal disc when outwarding winding (3).
2. the anti-fake bottle lid that has wireless radio frequency identification mark as claimed in claim 1, it is characterized in that, be provided with at least two of stretching out in the described top cover (1) downwards and scrape pin (103), described seal disc (3) is provided with circular arc type slot scraping (302), be provided with through hole (204) corresponding to scraping the wireless radio frequency identification mark (2) that pin (103) locates, the described pin (103) of scraping passes through hole (204) and is deep in the slot scraping (302), and described wireless radio frequency identification mark (2) is fixed on the seal disc (3).
3. the anti-fake bottle lid that has wireless radio frequency identification mark as claimed in claim 2 is characterized in that, described slot scraping (302) end is provided with stop mouth (303), and the described initial position of scraping pin (103) is arranged on stop mouth (303) and locates.
4. the anti-fake bottle lid that has wireless radio frequency identification mark as claimed in claim 1, it is characterized in that, the edge of described seal disc (3) is provided with dop (304), corresponding top cover (1) inwall is provided with block (102), and the dop of seal disc (304) rotates with top cover (1) under the drive of block (102) during bottle cap screwing.
5. the anti-fake bottle lid that has wireless radio frequency identification mark as claimed in claim 1, it is characterized in that, the matrix border of described wireless radio frequency identification mark (2) is provided with tearing port (205), and the upper and lower surface of the matrix of wireless radio frequency identification mark (201) fixes with top cover (1) lower surface and seal disc (3) upper surface respectively.
6. the anti-fake bottle lid that has wireless radio frequency identification mark as claimed in claim 5, it is characterized in that, the upper surface of described tearing port place (205) matrix lower surface and seal disc (3) fixes, and the upper surface and top cover (1) lower surface of matrix (201) centre portion of described wireless radio frequency identification mark (2) are fixedly connected.
7. the anti-fake bottle lid that has wireless radio frequency identification mark as claimed in claim 6, it is characterized in that, described wireless radio frequency identification mark (2) presets along tearing port (205) and tears head (206), and the described upper surface of tearing head (206) lower surface and seal disc (3) fixes.
8. the anti-fake bottle lid that has wireless radio frequency identification mark as claimed in claim 5, it is characterized in that, the lower surface that described tearing port (205) is located body upper surface and top cover (1) fixes, and the lower surface and seal disc (3) upper surface of matrix (201) centre portion of described wireless radio frequency identification mark (2) are fixedly connected.
9. the anti-fake bottle lid that has wireless radio frequency identification mark as claimed in claim 8, it is characterized in that, described wireless radio frequency identification mark (2) presets along tearing port (205) and tears head (206), and the described lower surface of tearing head (206) upper surface and top cover (3) fixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200692972U CN201023809Y (en) | 2007-04-25 | 2007-04-25 | Unscrewing-invalidating false-proof bottle cap with wireless radio frequency identification label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200692972U CN201023809Y (en) | 2007-04-25 | 2007-04-25 | Unscrewing-invalidating false-proof bottle cap with wireless radio frequency identification label |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201023809Y true CN201023809Y (en) | 2008-02-20 |
Family
ID=39097661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200692972U Expired - Lifetime CN201023809Y (en) | 2007-04-25 | 2007-04-25 | Unscrewing-invalidating false-proof bottle cap with wireless radio frequency identification label |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201023809Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785830A (en) * | 2011-05-20 | 2012-11-21 | 国民技术股份有限公司 | Anti-counterfeit label and bottle cover |
| CN102785828A (en) * | 2008-06-20 | 2012-11-21 | 东洋制罐株式会社 | Resin overcap provided with ic tag |
| US8752764B2 (en) | 2010-08-18 | 2014-06-17 | Jianmin Liu | System for electronically sealing an item and verifying the authenticity of the item sealed |
| CN104724384A (en) * | 2013-12-20 | 2015-06-24 | 上海建宝光纤技术有限公司 | Anti-fake bottle cap |
| CN106742661A (en) * | 2017-01-13 | 2017-05-31 | 浙江天地人科技有限公司 | A kind of bung |
| CN109502175A (en) * | 2018-12-12 | 2019-03-22 | 杭州沃朴物联科技有限公司 | A kind of self-desttruction equipment of uncapping of anti-fake bottle lid |
| CN109502176A (en) * | 2018-12-12 | 2019-03-22 | 杭州沃朴物联科技有限公司 | Cap-opening self-destroying anti-fake bottle lid |
| CN109502177A (en) * | 2018-12-12 | 2019-03-22 | 杭州沃朴物联科技有限公司 | The self-desttruction equipment of uncapping of anti-fake bottle lid |
| CN109502178A (en) * | 2018-12-12 | 2019-03-22 | 杭州沃朴物联科技有限公司 | A kind of cap-opening self-destroying anti-fake bottle lid |
| WO2019062530A1 (en) * | 2017-09-30 | 2019-04-04 | 浙江鑫泊物流科技有限公司 | Commodity tracing and anti-counterfeiting method and device |
-
2007
- 2007-04-25 CN CNU2007200692972U patent/CN201023809Y/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785828A (en) * | 2008-06-20 | 2012-11-21 | 东洋制罐株式会社 | Resin overcap provided with ic tag |
| CN102785828B (en) * | 2008-06-20 | 2015-04-29 | 东洋制罐株式会社 | Resin overcap provided with ic tag |
| US8752764B2 (en) | 2010-08-18 | 2014-06-17 | Jianmin Liu | System for electronically sealing an item and verifying the authenticity of the item sealed |
| CN102785830A (en) * | 2011-05-20 | 2012-11-21 | 国民技术股份有限公司 | Anti-counterfeit label and bottle cover |
| CN102785830B (en) * | 2011-05-20 | 2015-06-17 | 国民技术股份有限公司 | Anti-counterfeit label and bottle cover |
| CN104724384A (en) * | 2013-12-20 | 2015-06-24 | 上海建宝光纤技术有限公司 | Anti-fake bottle cap |
| CN106742661A (en) * | 2017-01-13 | 2017-05-31 | 浙江天地人科技有限公司 | A kind of bung |
| JP2020536415A (en) * | 2017-09-30 | 2020-12-10 | 浙江▲しん▼泊物流科技有限公司Ｎｐ２ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ． | Product traceability Anti-counterfeiting methods and equipment |
| WO2019062530A1 (en) * | 2017-09-30 | 2019-04-04 | 浙江鑫泊物流科技有限公司 | Commodity tracing and anti-counterfeiting method and device |
| JP7022821B2 (en) | 2017-09-30 | 2022-02-18 | 浙江▲しん▼泊物流科技有限公司 | Product traceability Anti-counterfeiting methods and equipment |
| JP2022081481A (en) * | 2017-09-30 | 2022-05-31 | 浙江▲しん▼泊物流科技有限公司 | Product traceability anti-counterfeiting method and device |
| CN109502176A (en) * | 2018-12-12 | 2019-03-22 | 杭州沃朴物联科技有限公司 | Cap-opening self-destroying anti-fake bottle lid |
| CN109502177A (en) * | 2018-12-12 | 2019-03-22 | 杭州沃朴物联科技有限公司 | The self-desttruction equipment of uncapping of anti-fake bottle lid |
| CN109502178A (en) * | 2018-12-12 | 2019-03-22 | 杭州沃朴物联科技有限公司 | A kind of cap-opening self-destroying anti-fake bottle lid |
| CN109502175A (en) * | 2018-12-12 | 2019-03-22 | 杭州沃朴物联科技有限公司 | A kind of self-desttruction equipment of uncapping of anti-fake bottle lid |
| CN109502175B (en) * | 2018-12-12 | 2023-08-18 | 杭州沃朴物联科技有限公司 | Cover opening self-destruction device of anti-fake bottle cap |
| CN109502176B (en) * | 2018-12-12 | 2023-08-18 | 杭州沃朴物联科技有限公司 | Cover-opening self-destroying anti-fake bottle cap |
| CN109502177B (en) * | 2018-12-12 | 2023-08-18 | 杭州沃朴物联科技有限公司 | Cover opening self-destroying device for anti-fake bottle cap |
| CN109502178B (en) * | 2018-12-12 | 2023-08-18 | 杭州沃朴物联科技有限公司 | Cover-opening self-destroying anti-fake bottle cap |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201023809Y (en) | Unscrewing-invalidating false-proof bottle cap with wireless radio frequency identification label | |
| CN104443743B (en) | RFID label special anti-counterfeiting bottle cap | |
| CA2440728C (en) | Package with integrated transponder | |
| CN2913227Y (en) | Rubber cap with wireless radio frequency recognition false proof function | |
| CN202765511U (en) | Wireless radio frequency anti-fake bottle cap | |
| CN102785830B (en) | Anti-counterfeit label and bottle cover | |
| CN206446985U (en) | A kind of RF anti-fake recognition system and the bottle cap coordinated with the system | |
| CN109502176B (en) | Cover-opening self-destroying anti-fake bottle cap | |
| CN102208043A (en) | Wine anti-counterfeiting identification method based on electronic tag and product information association processing | |
| CN202807392U (en) | Radio frequency identification (RFID) anti-counterfeiting wine bottle cover | |
| CN210392087U (en) | Anti-fake bottle cap | |
| CN203714409U (en) | Intelligent bottle cap | |
| CN109502178B (en) | Cover-opening self-destroying anti-fake bottle cap | |
| CN2913218Y (en) | Wrest-damage-type false proof bottle cap | |
| CN109502175B (en) | Cover opening self-destruction device of anti-fake bottle cap | |
| CN109502177B (en) | Cover opening self-destroying device for anti-fake bottle cap | |
| CN101797997B (en) | Anti-fake bottle cap with electronic tag | |
| CN202807382U (en) | Screw type anti-false bottle cap with self-destruction function | |
| CN201169421Y (en) | Anti-counterfeit bottle cap | |
| CN111591587B (en) | Anti-fake bottle cap and bottle | |
| CN211443403U (en) | Hidden anti-fake theftproof bottle lid package assembly | |
| CN220375269U (en) | Anti-fake bottle cap and anti-fake material bottle | |
| TWI533228B (en) | A radio frequency anti - counterfeit label structure | |
| CN210365050U (en) | Anti-fake cover and anti-fake container | |
| CN213893634U (en) | Anti-fake ring with display screen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI TECHSUN ANTI-COUNTERFEITING TECHNOLOGY CO Free format text: FORMER NAME: TIANCHEN NEW TECHNOLOGY CO LTD, FUDAN UNIV, SHANGHAI |
|
| CP03 | Change of name, title or address |
Address after: 201614 No. 509 Guanghua Road, little Kunshan Town, Shanghai, Songjiang District Patentee after: Shanghai Tiancheng Anticounterfeit Technology Co.,Ltd. Address before: 5, building 1, building 127, Lane 200433, Cathay Road, Yangpu District, Shanghai Patentee before: Tianchen New Technology Co., Ltd., Fudan Univ, Shanghai |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080220 |
|
| CX01 | Expiry of patent term |