US3153401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument
Assignee: WA Sheaffer Pen Co
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Filing: 1962-05-10
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Granted: 1964-10-20
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Expires: 1982-05-10
Abstract
No abstract record available.
Inventors
- 👤 Nathan A Zepell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:02
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/16; B43K24/00; B43K24/02; B43K24/08; B43K24/082
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
148 words
A WRITING INSTRUMENT, COMPRISING A RESERVOIR SECTION, A WRITING ELEMENT EXTENDING FORWARDLY OF SAID RESERVOIR SECTION AND TERMINATING IN A FLEXIBLE WRITING POINT, SAID POINT INCLUDING A WRITING TIP AND ADJACENT NIB PORTONS FORMING A FLUID CHANNEL EXTENDING THROUGH SAID TIP, SAID NIB PORTIONS BEING SEPARABLE TO INCREASE THE WIDTH OF SAID FLUID CHANNEL UPON FLEXING OF SAID WRITING POINT, A FEED PROVIDING A FLUID PASSAGE BETWEEN SAID RESERVOIR AND SAID FLUID CHANNEL, A RESILIENT COVER MEMBER CARRIED BY SAID POINT, SAID COVER MEMBER ENVELOPING AT LEAST A PORTION OF SAID POINT TO ENCLOSE SAID CHANNEL EXCEPT ADJACENT SAID WRITING TIP, AND A SEAL ELEMENT IN ENGAGEMENT WITH AND EXTENDING FROM SAID COVER MEMBER THROUGH SAID FLUID CHANNEL ADJACENT SAID TIP, SAID SEAL ELEMENT ENGAGING SAID NIB PORTIONS TO PREVENT COMMUNICATION BETWEEN SAID CHANNEL AND SAID TIP EXCEPT UPON WIDENING OF SAID CHANNEL DURING FLEXURE OF SAID POINT.
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) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |