US3718401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nib and writing instrument construction with capillary action
Assignee: Individual
•
Filing: 1970-12-04
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Granted: 1973-02-27
•
Expires: 1990-12-04
Abstract
Abstract A NIB AND WRITING INSTRUMENT CONSTRUCTION HAVING A PLURALITY OF ELONGATED ELEMENT WITHIN A TUBULAR CASING EACH HAVING PERIPHERAL, LONGITUDINAL GROOVES OR CORRUGATIONS DEFINING JOINTLY AND WITH THE CASING LONGITUDINAL CAPILLARY PASSAGEWAYS FOR WRITING FLUID FLOW THERETHROUGH FROM A WRITING FLUID RESERVOIR. THE ELEMENTS CAN BE MADE OF RESIN AND THE CASING ALSO OF A SUITABLE PLASTIC AND SHARPENED TO A WRITING POINT. THE ELONGATED ELEMENTS ARE HELD FRICTIONALLY IN THE CASING IN AN ASSEMBLED CONDITION AND CAN THEMSELVES BE PROVIDED WITH A CENTRAL CAPILLARY PASSAGEWAY HAVING A DESIRED CROSS SECTION AND THIS PASSAGEWAY MAY BE FILLED WITH FIBERS.
Inventors
- 👤 Y Kiriu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:43
CPC Classifications
B; B43; B43K; B43K1/00; B43K1/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |