US3087463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instruments
Assignee: David Kahn Inc
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Filing: 1959-02-13
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Granted: 1963-04-30
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Expires: 1979-02-13
Abstract
No abstract record available.
Inventors
- 👤 Julius M Kahn
- 👤 Kahn Samuel
- 👤 Yager Harry
- 👤 Helen E Weisser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:29
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/02; B43K5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A WRITING INSTRUMENT COMPRISING A BARREL HAVING AN OPEN FORWARD EXTREMITY, A REPLACEABLE RIGID CARTRIDGE CONTAINING LIQUID WRITING FLUID, SAID CARTRIDGE BEING SLIDABLY POSITIONED WITHIN SAID BARREL, SAID CARTRIDGE HAVING A CLOSED REAR END PORTION CONSTITUTED BY A DEFORMABLE REARWARDLY EXTENDING BULGED PORTION, SAID BULGED PORTION DEFINING A RELATIVELY SMALL PORTION OF THE VOLUME OF SAID CARTRIDGE, DEFORMING MEANS IMMOVABLY POSITIONED WITHIN SAID BARREL AND LIMITING THE REARWARD MOVEMENT OF SAID CARTRIDGE WITHIN SAID BARREL, A PEN SECTION SECURED TO THE OPEN FORWARD EXTREMITY OF SAID BARREL, SAID PEN SECTION HAVING A REARWARDLY EXTENDING INK FEED SECTION, SAID INK FEED SECTION EXTENDING INTO SAID CARTRIDGE, SAID CARTRIDGE BEING NORMALLY SEPARABLE FROM SAID INK FEED SECTION, SAID PEN SECTION ENGAGING SAID CARTRIDGE AND FORCING THE REAR OF SAID CARTRIDGE AGAINST SAID DEFORMING MEANS WHEREBY SAID BULGED PORTION IS DEFORMED AND FORCED INWARDLY OF SAID CARTRIDGE TO SLIGHTLY REDUCE THE VOLUME OF SAID CARTRIDGE AND TO FORCE ONLY A SMALL AMOUNT OF THE WRITING FLUID OUT OF SAID CARTRIDGE INTO SAID INK FEED SECTION.
Claim 2
Dependent Claim
172 words
A WRITING INSTRUMENT COMPRISING A BARREL HAVING AN OPEN FORWARD EXTREMITY, A REPLACEABLE RIGID CARTRIDGE CONTAINING LIQUID WRITING FLUID, SAID CARTRIDGE BEING SLIDABLY POSITIONED WITHIN SAID BARREL, SAID CARTRIDGE HAVING A CLOSED REAR END PORTION CONSTITUTED BY A DEFORMABLE REARWARDLY EXTENDING BULGED PORTION, SAID BULGED PORTION DEFINING A RELATIVELY SMALL PORTION OF THE VOLUME OF SAID CARTRIDGE, DEFORMING MEANS IMMOVABLY POSITIONED WITHIN SAID BARREL AND LIMITING THE REARWARD MOVEMENT OF SAID CARTRIDGE WITHIN SAID BARREL, A PEN SECTION SECURED TO THE OPEN FORWARD EXTREMITY OF SAID BARREL, SAID PEN SECTION HAVING A REARWARDLY EXTENDING INK FEED SECTION, SAID INK FEED SECTION EXTENDING INTO SAID CARTRIDGE, SAID CARTRIDGE BEING NORMALLY SEPARABLE FROM SAID INK FEED SECTION, SAID PEN SECTION ENGAGING SAID CARTRIDGE AND FORCING THE REAR OF SAID CARTRIDGE AGAINST SAID DEFORMING MEANS WHEREBY SAID BULGED PORTION IS DEFORMED AND FORCED INWARDLY OF SAID CARTRIDGE TO SLIGHTLY REDUCE THE VOLUME OF SAID CARTRIDGE AND TO FORCE ONLY A SMALL AMOUNT OF THE WRITING FLUID OUT OF SAID CARTRIDGE INTO SAID INK FEED SECTION.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |