Patent DE613160C successfully refreshed from Google Patents.
Patent US3138142A successfully refreshed from Google Patents.
US3138142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument unit
Assignee: David Kahn Inc
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Filing: 1961-10-13
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Granted: 1964-06-23
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Expires: 1981-10-13
Abstract
No abstract record available.
Inventors
- 👤 Morris D Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:08
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/02; B43K5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A UNIVERSAL FOUNTAIN PEN CARTRIDGE COMPRISING AN ELONGATED, TUBULAR INK-CONTAINING RESERVOIR, EACH END OF SAID RESERVOIR BEING SEALED BY AN OPENABLE PARTITION, SAID RESERVOIR COMPRISING A MAIN BODY PORTION OF SUBSTANTIALLY UNIFORM EXTERNAL DIAMETER, AN AXIAL EXTENSION ON EACH END OF SAID BODY PORTION, EACH EXTENSION HAVING AN EXTERNAL DIAMETER LESS THAN THE DIAMETER OF SAID BODY PORTION, A FIRST EXTENSION PLUG HAVING AN AXIAL BORE AT ONE END THEREOF, ONE OF SAID AXIAL EXTENSIONS OF SAID BODY PORTION BEING REMOVABLY RECEIVABLE WITHIN SAID BORE OF SAID PLUG, SAID PLUG, WHEN SAID AXIAL EXTENSION IS SEATED IN SAID BORE, LONGITUDINALLY ENLARGING SAID RESERVOIR, AND A SECOND EX-
Claim 2
Dependent Claim
107 words
A UNIVERSAL FOUNTAIN PEN CARTRIDGE COMPRISING AN ELONGATED, TUBULAR INK-CONTAINING RESERVOIR, EACH END OF SAID RESERVOIR BEING SEALED BY AN OPENABLE PARTITION, SAID RESERVOIR COMPRISING A MAIN BODY PORTION OF SUBSTANTIALLY UNIFORM EXTERNAL DIAMETER, AN AXIAL EXTENSION ON EACH END OF SAID BODY PORTION, EACH EXTENSION HAVING AN EXTERNAL DIAMETER LESS THAN THE DIAMETER OF SAID BODY PORTION, A FIRST EXTENSION PLUG HAVING AN AXIAL BORE AT ONE END THEREOF, ONE OF SAID AXIAL EXTENSIONS OF SAID BODY PORTION BEING REMOVABLY RECEIVABLE WITHIN SAID BORE OF SAID PLUG, SAID PLUG, WHEN SAID AXIAL EXTENSION IS SEATED IN SAID BORE, LONGITUDINALLY ENLARGING SAID RESERVOIR, AND A SECOND EX-
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |