US3099252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument and ink therefor
Assignee: Scripto Inc
•
Filing: 1958-12-22
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Granted: 1963-07-30
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Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Eugene P Cofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:04
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/02; B43K7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A PRESSURIZED BALL POINT PEN, COMPRISING AN INK RESERVOIR HAVING ONE END THEREOF CLOSED AND THE OTHER END FITTED WITH A ROTATABLE BALL POINT, A SUPPLY OF INK CONTAINED IN SAID RESERVOIR FOR FEEDING TO SAID BALL POINT, AND A SUPPLY OF GASEOUS-LIQUID PROPELLANT ARRANGED IN SAID RESERVOIR TO CREATE A UNIFORM SUPERATMOSPHERIC PRESSURE REARWARDLY OF SAID INK SUPPLY FOR EXERTING A FEEDING FORCE THEREON GREATER THAN THE FORCE OF GRAVITY, SAID INK BEING CHARACTERIZED BY A YIELD VALUE REQUIRING SAID SUPERATMOSPHERIC PRESSURE TO EFFECT FLOW THEREOF FOR FEEDING TO SAID BALL POINT AND THE YIELD VALUE OF SAID INK BEING SUCH THAT UNDER SAID SUPERATMOSPHERIC PRESSURE THE INK WILL NOT PASS THE BALL POINT IN THE ABSENCE OF THE SHEARING FORCE APPLIED THERETO BY ROTATION OF SAID BALL POINT, SAID YIELD VALUE OF THE INK BEING PRODUCED BY THE PIGMENT CONCENTRATION THERETO AND SAID PIGMENT CONCENTRATION BEING SELECTED TO PROVIDE A DESIRED OPACITY IN SAID INK UPON BEING TRANSFERRED TO A WRITING SURFACE.
Claim 2
Dependent Claim
164 words
A PRESSURIZED BALL POINT PEN, COMPRISING AN INK RESERVOIR HAVING ONE END THEREOF CLOSED AND THE OTHER END FITTED WITH A ROTATABLE BALL POINT, A SUPPLY OF INK CONTAINED IN SAID RESERVOIR FOR FEEDING TO SAID BALL POINT, AND A SUPPLY OF GASEOUS-LIQUID PROPELLANT ARRANGED IN SAID RESERVOIR TO CREATE A UNIFORM SUPERATMOSPHERIC PRESSURE REARWARDLY OF SAID INK SUPPLY FOR EXERTING A FEEDING FORCE THEREON GREATER THAN THE FORCE OF GRAVITY, SAID INK BEING CHARACTERIZED BY A YIELD VALUE REQUIRING SAID SUPERATMOSPHERIC PRESSURE TO EFFECT FLOW THEREOF FOR FEEDING TO SAID BALL POINT AND THE YIELD VALUE OF SAID INK BEING SUCH THAT UNDER SAID SUPERATMOSPHERIC PRESSURE THE INK WILL NOT PASS THE BALL POINT IN THE ABSENCE OF THE SHEARING FORCE APPLIED THERETO BY ROTATION OF SAID BALL POINT, SAID YIELD VALUE OF THE INK BEING PRODUCED BY THE PIGMENT CONCENTRATION THERETO AND SAID PIGMENT CONCENTRATION BEING SELECTED TO PROVIDE A DESIRED OPACITY IN SAID INK UPON BEING TRANSFERRED TO A WRITING SURFACE.
References Cited (Backward Citations)
BE517217A
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US2249163A
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US2333451A
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US2506035A
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GB695621A
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FR1053515A
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FR1055674A
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US2715388A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |