公开(公告)号：US2504649A

公开(公告)日：1950-04-18

申请号：US57777345

申请日：1945-02-14

Applicant: EAGLE PENCIL CO

Inventor： ISIDOR CHESLER

IPC: B43K7/02

CPC classification number: B43K7/02

公开(公告)号：US2476321A

公开(公告)日：1949-07-19

申请号：US69931346

申请日：1946-09-25

Applicant: PERWAS LUDWIG F

Inventor： PERWAS LUDWIG F

IPC: B43K1/08 ,  B43K7/02

CPC classification number: B43K7/02 ,  B43K1/08

公开(公告)号：US2444004A

公开(公告)日：1948-06-22

申请号：US57449845

申请日：1945-01-25

Applicant: EAGLE PENCIL CO

Inventor： ISIDOR CHESLER

IPC: B43K1/08 ,  B43K7/02

CPC classification number: B43K7/02 ,  B43K1/08

公开(公告)号：US2427033A

公开(公告)日：1947-09-09

申请号：US55814444

申请日：1944-10-11

Applicant: EVERSHARP INC

Inventor： WAHL JOHN C

IPC: B43K7/02

CPC classification number: B43K7/02

公开(公告)号：US2425198A

公开(公告)日：1947-08-05

申请号：US59893245

申请日：1945-06-12

Applicant: PREMIUM MERCHANDISING CORP

Inventor： PELTON MOORE DAVID

IPC: B43K1/08 ,  B43K7/02

CPC classification number: B43K1/08 ,  B43K7/02

公开(公告)号：US1839160A

公开(公告)日：1931-12-29

申请号：US22699827

申请日：1927-10-18

Applicant: NISSEN JR JOHN P

Inventor： NISSEN JR JOHN P

IPC: B43K1/08 ,  B43K7/02

CPC classification number: B43K1/086 ,  B43K7/02 ,  Y10T29/49853

公开(公告)号：US20250033402A1

公开(公告)日：2025-01-30

申请号：US18716302

申请日：2022-12-05

Applicant: KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION) ,  THE PILOT INK CO., LTD.

Inventor： Tomoya IKAI ,  Misako MABUCHI

IPC: B43K7/08 ,  B43K7/02 ,  B43K7/10

Abstract: Please replace the current abstract with the following amended abstract.
An ink retention member includes an ink retention portion including ink retention grooves and ink guiding grooves. The ink retention member includes a first horizontal hole penetrating radially therethrough and being in communication with an inner hole. The first horizontal hole and the ink guiding grooves are formed not to communicate with each other in a transverse cross-section. The first horizontal hole is provided in a rear half portion of the ink retention portion. The ink retention member includes a second horizontal hole that is disposed forward from the first horizontal hole, radially penetrates therethrough, and communicates with the inner hole. The first horizontal hole and the second horizontal hole are each provided to penetrate at least one comb tooth axially and communicate with the ink retention grooves adjacent to the comb tooth.

公开(公告)号：US12030337B2

公开(公告)日：2024-07-09

申请号：US18041651

申请日：2021-08-30

Applicant: SOCIÉTÉ BIC

Inventor： Arnaud Bez ,  Etienne Roudaut

IPC: B43K5/03 ,  B43K7/02

CPC classification number: B43K5/03 ,  B43K7/02

Abstract: A refillable free ink writing instrument including a body having a rear end, a front end and an ink reservoir disposed between the rear end and the front end, a writing tip mounted on the front end and a plug mounted on the rear end, wherein the plug is configured to close an opening in fluid communication with the ink reservoir, the plug being configured to be removable from the rear end to refill the ink reservoir with water and concentrated ink refill.

公开(公告)号：US11738589B2

公开(公告)日：2023-08-29

申请号：US17532043

申请日：2021-11-22

Applicant: THE PILOT INK CO., LTD. ,  KABUSHIKI KAISHA PILOT CORPORATION

Inventor： Yoshihiro Ito

IPC: B43K25/02 ,  C09D11/16 ,  B43K7/02 ,  B43K7/08 ,  B43K7/12 ,  B43K15/00 ,  B43K23/008 ,  B43K24/04 ,  B43K29/02 ,  B43K29/00 ,  B43K7/00 ,  C09D11/17

CPC classification number: B43K25/024 ,  B43K7/005 ,  B43K7/02 ,  B43K7/08 ,  B43K7/12 ,  B43K15/00 ,  B43K23/008 ,  B43K24/04 ,  B43K25/028 ,  B43K29/02 ,  C09D11/16 ,  C09D11/17

Abstract: A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.

公开(公告)号：US20220194118A1

公开(公告)日：2022-06-23

申请号：US17603712

申请日：2020-03-11

Applicant: MITSUBISHI PENCIL COMPANY, LIMITED

Inventor： Kousuke OGURA ,  Yuichiro HOMMA

IPC: B43K1/08 ,  B43K7/02 ,  C09D11/18 ,  C04B35/56

Abstract: A water-based ballpoint pen contains an aqueous ink composition in which resin particles having an average particle diameter of at least 0.3 μm are blended. The water-based ballpoint pen is provided with a ballpoint pen tip including a writing ball. The writing ball is formed from a mixture that includes a hard phase component comprising tungsten carbide, a binder phase component comprising cobalt and nickel, and chromium.