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US3340560A Expired / Lapsed US ⏱️ 0.0 years remaining

Fiber tip writing utensils

Assignee: Platinum Pen Co Ltd
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Filing: 1964-10-07
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Granted: 1967-09-12
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Expires: 1984-10-07
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Abstract

No abstract record available.

Inventors

  • 👤 Nakata Shunichi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 20:24
CPC Classifications
B; B43; B43K; B43K8/00; B43K8/02; B43K8/04; B43K8/06

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 252 words
A WRITING UTENSIL HAVING A FORWARD WRITING END AND A REARWARD OPPOSITE END, COMPRISING: A DISPOSABLE WRITING TIP MEANS CONSITING ESSENTIALLY OF AN ELONGATE COLUMNAR WRITING ELEMENT OF INK ABSORBING MATERIAL AND A HOLDER HAVING A LONGITUDINAL BORE THERETHROUGH FRICTIONALLY HOLDING SAID WRITING ELEMENT THEREIN WITH THE REARWARD END PORTION OF SAID WRITING ELEMENT EXTENDING OUT OF SAID HOLDER AND WITH THE FORWARD TIP END EXTENDING FORWARDLY OUT OF THE HOLDER TO FORM A WRITING POINT; A HOLLOW CYLINDRICAL BODY HAVING MEANS FOR DETACHABLY ENGAGING SAID HOLDER FOR SECURELY SUPPORTING SAID WRITING TIP MEANS THEREON; AN INK ADJUSTING MEMBER MOUNTED WITHIN SAID HOLLOW CYLINDRICAL BODY AND HAVING A LONGITUDINAL BORE FOR RECEIVING THEREIN SAID REARWARD END PORTION OF SAID WRITING ELEMENT; SAID ADJUSTING MEMBER HAVING ITS REARWARD PORTION FORMED AS AN ELONGATED HOLLOW CYLINDRICAL EXTENSION; SAID INK ADJUSTING MEMBER COMPRISING A TUBULAR CORE AND A PLURALITY OF COAXIALLY SPACED PARALLEL ANNULAR DISCS CONNECTING WITH ONE ANOTHER BY AND MOUNTED ON SAID TUBULAR CORE; SAID ADJUSTING MEMBER HAVING A LONGITUDINALLY EXTENDING PASSAGEWAY FORMING COMMUNICATION PATHS BETWEEN SAID ADJUSTING MEMBER LONGITUDINAL BORE AND THE SPACES BETWEEN SAID DISCS; A REPLACEABLE INK RESERVOIR DISPOSED IN SAID HOLLOW CYLINDRICAL BODY AND HAVING A FORWARD OPENING SNUGLY FITTED IN INK SEALING ENGAGEMENT ON SAID REARWARD EXTENSION OF SAID INK ADJUSTING MEMBER; SAID LONGITUDINAL BORE OPENING INTO SAID RESERVOIR; AND THE REARWARD END OF SAID WRITING ELEMENT EXTENDING AT LEAST SUBSTANTIALLY THE LENGTH OF SAID LONGITUDINAL BORE FOR CONDUCTING INK DIRECTLY FROM SAID RESERVOIR THROUGH SAID LONGITUDINAL BORE.
Claim 2
Dependent Claim 252 words
A WRITING UTENSIL HAVING A FORWARD WRITING END AND A REARWARD OPPOSITE END, COMPRISING: A DISPOSABLE WRITING TIP MEANS CONSITING ESSENTIALLY OF AN ELONGATE COLUMNAR WRITING ELEMENT OF INK ABSORBING MATERIAL AND A HOLDER HAVING A LONGITUDINAL BORE THERETHROUGH FRICTIONALLY HOLDING SAID WRITING ELEMENT THEREIN WITH THE REARWARD END PORTION OF SAID WRITING ELEMENT EXTENDING OUT OF SAID HOLDER AND WITH THE FORWARD TIP END EXTENDING FORWARDLY OUT OF THE HOLDER TO FORM A WRITING POINT; A HOLLOW CYLINDRICAL BODY HAVING MEANS FOR DETACHABLY ENGAGING SAID HOLDER FOR SECURELY SUPPORTING SAID WRITING TIP MEANS THEREON; AN INK ADJUSTING MEMBER MOUNTED WITHIN SAID HOLLOW CYLINDRICAL BODY AND HAVING A LONGITUDINAL BORE FOR RECEIVING THEREIN SAID REARWARD END PORTION OF SAID WRITING ELEMENT; SAID ADJUSTING MEMBER HAVING ITS REARWARD PORTION FORMED AS AN ELONGATED HOLLOW CYLINDRICAL EXTENSION; SAID INK ADJUSTING MEMBER COMPRISING A TUBULAR CORE AND A PLURALITY OF COAXIALLY SPACED PARALLEL ANNULAR DISCS CONNECTING WITH ONE ANOTHER BY AND MOUNTED ON SAID TUBULAR CORE; SAID ADJUSTING MEMBER HAVING A LONGITUDINALLY EXTENDING PASSAGEWAY FORMING COMMUNICATION PATHS BETWEEN SAID ADJUSTING MEMBER LONGITUDINAL BORE AND THE SPACES BETWEEN SAID DISCS; A REPLACEABLE INK RESERVOIR DISPOSED IN SAID HOLLOW CYLINDRICAL BODY AND HAVING A FORWARD OPENING SNUGLY FITTED IN INK SEALING ENGAGEMENT ON SAID REARWARD EXTENSION OF SAID INK ADJUSTING MEMBER; SAID LONGITUDINAL BORE OPENING INTO SAID RESERVOIR; AND THE REARWARD END OF SAID WRITING ELEMENT EXTENDING AT LEAST SUBSTANTIALLY THE LENGTH OF SAID LONGITUDINAL BORE FOR CONDUCTING INK DIRECTLY FROM SAID RESERVOIR THROUGH SAID LONGITUDINAL BORE.

References Cited (Backward Citations)

US2770221A Cited
US2958085A Cited
US2902978A Cited
US3003182A Cited
GB941439A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1970-09-11 1971-03-13 1971-09-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1974-09-11 1975-03-13 1975-09-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1978-09-11 1979-03-13 1979-09-12 $7700.00 Window Closed / Lapsed

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