US3306267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink writing implement
Assignee: Dai Nihon Bungu Co Ltd
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Filing: 1965-08-06
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Granted: 1967-02-28
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Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 Matsumoto Hiroyuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:02
CPC Classifications
B; B43; B43K; B43K1/00; B43K1/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
AN INK WRITING IMPLEMENT INCLUDING A TUBULAR PEN CORE WITH A CENTRAL PASSAGE, AN INK RESERVOIR FITTED TO ONE END OF THE PEN CORE AND IN COMMUNICATION WITH THE CENTRAL PASSAGE, AND A PEN POINT ENTIRELY OF MOLDED PLASTIC FITTED TO THE OTHER END OF THE PEN CORE, SAID PEN POINT HAVING A PLURALITY OF SURFACE INK CHANNELS AND A PLURALITY OF INTERNAL PASSAGES WHICH CONNECT THE CENTRAL PASSAGE OF THE PEN CORE WITH THE SURFACE INK CHANNELS WHEREIN SAID CENTRAL PASSAGE CONTAINS A CORE ROD HAVING A CAPILLARY INK FLOW CONTROL CHANNEL.
Claim 2
Dependent Claim
93 words
AN INK WRITING IMPLEMENT INCLUDING A TUBULAR PEN CORE WITH A CENTRAL PASSAGE, AN INK RESERVOIR FITTED TO ONE END OF THE PEN CORE AND IN COMMUNICATION WITH THE CENTRAL PASSAGE, AND A PEN POINT ENTIRELY OF MOLDED PLASTIC FITTED TO THE OTHER END OF THE PEN CORE, SAID PEN POINT HAVING A PLURALITY OF SURFACE INK CHANNELS AND A PLURALITY OF INTERNAL PASSAGES WHICH CONNECT THE CENTRAL PASSAGE OF THE PEN CORE WITH THE SURFACE INK CHANNELS WHEREIN SAID CENTRAL PASSAGE CONTAINS A CORE ROD HAVING A CAPILLARY INK FLOW CONTROL CHANNEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |