TW462896B - Golf club head with vibration damping channels and method of manufacturing golf club head - Google Patents
Golf club head with vibration damping channels and method of manufacturing golf club head Download PDFInfo
- Publication number
- TW462896B TW462896B TW088122551A TW88122551A TW462896B TW 462896 B TW462896 B TW 462896B TW 088122551 A TW088122551 A TW 088122551A TW 88122551 A TW88122551 A TW 88122551A TW 462896 B TW462896 B TW 462896B
- Authority
- TW
- Taiwan
- Prior art keywords
- club head
- channels
- golf club
- channel
- patent application
- Prior art date
Links
- 238000013016 damping Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title description 4
- 239000000463 material Substances 0.000 claims abstract description 27
- 229920001971 elastomer Polymers 0.000 claims description 14
- 239000000806 elastomer Substances 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 230000002079 cooperative effect Effects 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 235000015170 shellfish Nutrition 0.000 claims description 2
- 238000013459 approach Methods 0.000 claims 6
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 2
- 238000000926 separation method Methods 0.000 claims 2
- 241000024244 Chelis Species 0.000 claims 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 1
- 230000003190 augmentative effect Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000005266 casting Methods 0.000 description 7
- 239000013536 elastomeric material Substances 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007514 turning Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 101100364969 Dictyostelium discoideum scai gene Proteins 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 235000015847 Hesperis matronalis Nutrition 0.000 description 1
- 240000004533 Hesperis matronalis Species 0.000 description 1
- 101100364971 Mus musculus Scai gene Proteins 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0408—Heads characterised by specific dimensions, e.g. thickness
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/047—Heads iron-type
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0416—Heads having an impact surface provided by a face insert
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0445—Details of grooves or the like on the impact surface
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Golf Clubs (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/218,733 US6093116A (en) | 1998-12-22 | 1998-12-22 | Golf club head with vibration damping channels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW462896B true TW462896B (en) | 2001-11-11 |
Family
ID=22816299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW088122551A TW462896B (en) | 1998-12-22 | 2000-01-07 | Golf club head with vibration damping channels and method of manufacturing golf club head |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6093116A (enExample) |
| JP (1) | JP2000225217A (enExample) |
| KR (1) | KR20000057089A (enExample) |
| GB (1) | GB2345001B (enExample) |
| TW (1) | TW462896B (enExample) |
Families Citing this family (71)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6334818B1 (en) * | 1996-09-06 | 2002-01-01 | Acushnet Company | Golf club head with an insert on the striking surface |
| US6893358B2 (en) * | 1999-09-03 | 2005-05-17 | Callaway Golf Company | Putter-type golf club head with an insert |
| US6368231B1 (en) * | 2000-02-09 | 2002-04-09 | Archer C. C. Chen | Stealth grooves of ball-striking face of golf club head |
| US6932716B2 (en) * | 2000-04-18 | 2005-08-23 | Callaway Golf Company | Golf club head |
| US6428427B1 (en) * | 2000-10-03 | 2002-08-06 | Callaway Golf Company | Golf club head with coated striking plate |
| US6443857B1 (en) * | 2001-01-12 | 2002-09-03 | Chao-Jan Chuang | Shock-absorbing golf-club head |
| US20040116205A1 (en) * | 2001-06-22 | 2004-06-17 | Lin Chung Sing | Shock-absorbing golf-club head |
| JP3925360B2 (ja) * | 2002-08-30 | 2007-06-06 | ブリヂストンスポーツ株式会社 | ゴルフクラブヘッド |
| US6723007B1 (en) * | 2002-12-09 | 2004-04-20 | O-Ta Precision Casting Co., Ltd. | Face of a golf club head |
| US7077763B2 (en) | 2003-05-12 | 2006-07-18 | Taylor Made Golf Company, Inc. | Iron-type golf club head |
| US20050020378A1 (en) | 2003-07-11 | 2005-01-27 | Krumme John F. | Faceplate backings and monolithic inserts for golf clubs |
| JP2005137913A (ja) * | 2003-11-10 | 2005-06-02 | Acushnet Co | パターゴルフクラブ |
| US7115041B2 (en) | 2003-12-02 | 2006-10-03 | Callaway Golf Company | Putter-type golf club head with an insert |
| US6971960B2 (en) * | 2003-12-02 | 2005-12-06 | Callaway Golf Company | Insert for golf club head |
| US7083531B2 (en) * | 2004-07-29 | 2006-08-01 | Callaway Golf Company | Iron-type golf club |
| US7192365B2 (en) * | 2004-12-21 | 2007-03-20 | Karsten Manufacturing Corporation | Golf club head with pixellated substrate |
| US7273420B2 (en) * | 2004-12-21 | 2007-09-25 | Karsten Manufacturing Corporation | Golf club head with multiple insert front face |
| JP4745806B2 (ja) * | 2005-12-05 | 2011-08-10 | ブリヂストンスポーツ株式会社 | ゴルフクラブヘッド |
| JP4837983B2 (ja) * | 2005-12-05 | 2011-12-14 | ブリヂストンスポーツ株式会社 | ゴルフクラブヘッド |
| JP4745807B2 (ja) * | 2005-12-05 | 2011-08-10 | ブリヂストンスポーツ株式会社 | ゴルフクラブヘッド |
| JP4713323B2 (ja) * | 2005-12-05 | 2011-06-29 | ブリヂストンスポーツ株式会社 | ゴルフクラブヘッド |
| JP2007151828A (ja) * | 2005-12-05 | 2007-06-21 | Bridgestone Sports Co Ltd | ゴルフクラブヘッド |
| JP5009525B2 (ja) * | 2005-12-26 | 2012-08-22 | ブリヂストンスポーツ株式会社 | ゴルフクラブヘッド |
| US7811180B2 (en) * | 2006-09-25 | 2010-10-12 | Cobra Golf, Inc. | Multi-metal golf clubs |
| US7794333B2 (en) | 2008-02-21 | 2010-09-14 | Sri Sports Limited | Strike face insert |
| US8216081B2 (en) | 2008-05-19 | 2012-07-10 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
| US7806779B2 (en) | 2008-05-19 | 2010-10-05 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
| US8425342B2 (en) | 2008-05-19 | 2013-04-23 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
| US7717801B2 (en) * | 2008-05-19 | 2010-05-18 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking face |
| US10315079B2 (en) | 2011-09-30 | 2019-06-11 | Karsten Manufacturing Corporation | Grooves of golf club heads and methods to manufacture grooves of golf club heads |
| USRE48977E1 (en) * | 2008-08-07 | 2022-03-22 | Karsten Manufacturing Corporation | Grooves of golf club heads and methods to manufacture grooves of golf club heads |
| US8449406B1 (en) * | 2008-12-11 | 2013-05-28 | Taylor Made Golf Company, Inc. | Golf club head |
| US8007370B2 (en) * | 2009-03-10 | 2011-08-30 | Cobra Golf, Inc. | Metal injection molded putter |
| US8430761B2 (en) * | 2009-09-24 | 2013-04-30 | Nike, Inc. | Golf club head wear indicator |
| US20110172026A1 (en) * | 2010-01-14 | 2011-07-14 | Callaway Golf Company | Metal injection molded grooved face insert |
| US8900064B2 (en) | 2010-09-13 | 2014-12-02 | Nike, Inc. | Putter heads and putters |
| US8506415B2 (en) | 2010-09-13 | 2013-08-13 | Nike, Inc. | Putter heads and putters including polymeric material as part of the ball striking surface |
| US8834285B2 (en) | 2010-09-13 | 2014-09-16 | Nike, Inc. | Putter heads and putters |
| US8961334B2 (en) | 2010-12-07 | 2015-02-24 | Nike, Inc. | Putter heads and putters including a ball striking face body member and a rear body member |
| US9022876B2 (en) | 2010-12-07 | 2015-05-05 | Nike, Inc. | Putter heads and putters |
| US9144717B2 (en) | 2011-08-23 | 2015-09-29 | Nike, Inc. | Putter heads and putters |
| KR102071697B1 (ko) | 2011-09-30 | 2020-03-02 | 카스턴 매뉴팩츄어링 코오포레이숀 | 골프 클럽 헤드의 그루브 및 골프 클럽 헤드의 그루브의 제조 방법 |
| US9033817B2 (en) | 2013-03-15 | 2015-05-19 | Nike, Inc. | Golf club irons including backing material behind ball striking face |
| US11167187B2 (en) | 2014-02-20 | 2021-11-09 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US12311239B2 (en) | 2014-02-20 | 2025-05-27 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US11344775B2 (en) | 2014-02-20 | 2022-05-31 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US10933286B2 (en) * | 2014-02-20 | 2021-03-02 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US11731013B2 (en) | 2014-02-20 | 2023-08-22 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US11541288B2 (en) | 2014-02-20 | 2023-01-03 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US12290724B2 (en) | 2014-02-20 | 2025-05-06 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US10960274B2 (en) | 2014-08-26 | 2021-03-30 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US10967231B2 (en) | 2014-08-26 | 2021-04-06 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US11684831B2 (en) | 2017-01-10 | 2023-06-27 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US11707651B2 (en) | 2017-01-10 | 2023-07-25 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture gulf club heads |
| US20230042378A1 (en) * | 2016-07-26 | 2023-02-09 | Acushnet Company | Golf club having a damping element for ball speed control |
| US12285660B2 (en) | 2017-01-10 | 2025-04-29 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US12303750B2 (en) * | 2017-01-10 | 2025-05-20 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US10213660B1 (en) | 2017-01-13 | 2019-02-26 | Cobra Golf Incorporated | Golf club with aerodynamic features on club face |
| US11192003B2 (en) | 2017-11-03 | 2021-12-07 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US11426640B2 (en) | 2017-11-03 | 2022-08-30 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US11707653B2 (en) | 2017-11-03 | 2023-07-25 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US11786786B2 (en) | 2018-02-12 | 2023-10-17 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| JP6854389B2 (ja) * | 2018-02-12 | 2021-04-07 | パーソンズ エクストリーム ゴルフ, エルエルシーParsons Xtreme Golf, Llc | ゴルフクラブヘッド及びゴルフクラブヘッド製造方法 |
| WO2019165467A1 (en) | 2018-02-26 | 2019-08-29 | Karsten Manufacturing Corporation | Multi-material iron golf club head |
| US11235212B2 (en) | 2018-02-26 | 2022-02-01 | Karsten Manufacturing Corporation | Multi-material iron golf club head |
| CN113543857A (zh) * | 2019-03-11 | 2021-10-22 | 帕森斯极致高尔夫有限责任公司 | 高尔夫球杆头和制造高尔夫球杆头的方法 |
| JP7319086B2 (ja) | 2019-04-26 | 2023-08-01 | ブリヂストンスポーツ株式会社 | アイアンヘッド |
| USD928895S1 (en) | 2019-12-18 | 2021-08-24 | Karsten Manufacturing Corporation | Golf club head |
| KR20230093056A (ko) * | 2020-10-30 | 2023-06-26 | 카스턴 매뉴팩츄어링 코오포레이숀 | 인서트를 갖는 골프 클럽 헤드 |
| USD1039090S1 (en) | 2022-10-20 | 2024-08-13 | Karsten Manufacturing Corporation | Golf club head |
| JP7626952B1 (ja) * | 2023-08-30 | 2025-02-05 | 株式会社プロギア | ゴルフクラブヘッド |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2034936A (en) * | 1931-07-15 | 1936-03-24 | George E Barnhart | Golf club |
| US1968626A (en) * | 1931-12-31 | 1934-07-31 | Leonard A Young | Resilient golf club head |
| FR2668376B1 (fr) * | 1990-10-25 | 1993-01-29 | Taylor Made Golf Co | Tete de club de golf. |
-
1998
- 1998-12-22 US US09/218,733 patent/US6093116A/en not_active Expired - Lifetime
-
1999
- 1999-12-20 JP JP11360806A patent/JP2000225217A/ja active Pending
- 1999-12-22 KR KR1019990060270A patent/KR20000057089A/ko not_active Withdrawn
- 1999-12-22 GB GB9930438A patent/GB2345001B/en not_active Expired - Fee Related
-
2000
- 2000-01-07 TW TW088122551A patent/TW462896B/zh not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2345001A (en) | 2000-06-28 |
| GB2345001B (en) | 2003-04-09 |
| JP2000225217A (ja) | 2000-08-15 |
| GB9930438D0 (en) | 2000-02-16 |
| US6093116A (en) | 2000-07-25 |
| KR20000057089A (ko) | 2000-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW462896B (en) | Golf club head with vibration damping channels and method of manufacturing golf club head | |
| US7959519B2 (en) | Golf club head with insert having indicia therein | |
| US10639526B2 (en) | Golf club irons including backing material behind ball striking face | |
| AU592140B2 (en) | Wood club head and method of manufacturing the same | |
| JP2002224253A (ja) | フェースインサートを有するカスタマイズ可能なゴルフパターヘッド | |
| US7273420B2 (en) | Golf club head with multiple insert front face | |
| US6328661B1 (en) | Multiple material golf club head with a polymer insert face | |
| US7452283B2 (en) | Putterhead with dual milled face pattern | |
| TW312627B (enExample) | ||
| CN103357150B (zh) | 高尔夫球杆头以及制造高尔夫球杆头的方法 | |
| CN102291956B (zh) | 具备触摸屏的携带式电子仪器用外壳 | |
| US20020065144A1 (en) | Multiple material golf club head with a polymer insert face | |
| AU2003247989A1 (en) | Methods and apparatus for a putter club head with high-density inserts | |
| US20100068422A1 (en) | Floating Acrylic Magnetic Plaque | |
| US7374499B2 (en) | Golf club head with dual durometer face insert | |
| TW205019B (en) | Method of making head of iron | |
| CN101072665A (zh) | 有插入芯的轻击棒型高尔夫球棍头和制造方法 | |
| JPH1085372A (ja) | ゴルフクラブ用ヘッド | |
| JPH0975484A (ja) | ゴルフクラブ用ソケット | |
| CN211403132U (zh) | 一种双层字面镶嵌装饰物的表盘结构 | |
| KR101981915B1 (ko) | 골프공의 스윙 임팩트 순간을 구현한 골프매트 장식물 | |
| JP3128328U (ja) | ゴルフパター用ヘッド | |
| TW436307B (en) | Method for producing of golf club head and product thereof | |
| CN2764194Y (zh) | 鞋底结构 | |
| CN106170322B (zh) | 高尔夫球杆头和制造高尔夫球杆头的方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GD4A | Issue of patent certificate for granted invention patent | ||
| MM4A | Annulment or lapse of patent due to non-payment of fees |