US3744923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pen with improved ventilation for its ink reservoir
Assignee: Individual
•
Filing: 1971-09-07
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Granted: 1973-07-10
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Expires: 1991-09-07
Abstract
Abstract Writing or drafting pen of the type having an ink reservoir, a vent system upwardly extending from the lower end of the pen to the top of said pen and in said pen a supply source of vapor to prevent the clogging up of said vent system with dried ink.
Inventors
- 👤 E Bok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:43
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18; B43K5/1818; B43K5/1827; B43K5/1836; B43K5/1845; B43K23/00; B43K23/08; B43K23/12; B43K8/00; B43K8/16; B43K8/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
A pen, comprising: a barrel, an ink reservoir within said barrel, a pen point at the lower end of said barrel and in communication with said ink reservoir via capillary tubing, venting means extending upwardly from the lower end of said revervoir, and a buffer within the lower end of said venting means for collecting ink received from said reservoir, said buffer comprising a plurality of separated, non-capillary channels.
Claim 2
Dependent Claim
69 words
A pen, comprising: a barrel, an ink reservoir within said barrel, a pen point at the lower end of said barrel and in communication with said ink reservoir via capillary tubing, venting means extending upwardly from the lower end of said revervoir, and a buffer within the lower end of said venting means for collecting ink received from said reservoir, said buffer comprising a plurality of separated, non-capillary channels.
Claim 3
Dependent Claim
32 words
A pen as in claim 1, including a second buffer within said venting means comprising a plurality of narrow channels and a communication chamber interposed between said buffer and said second buffer.
Claim 4
Dependent Claim
20 words
A pen as in claim 2, wherein said buffer further comprises a bottom member provided with a central venting channel.
Claim 5
Dependent Claim
20 words
A pen as in claim 3, whereby said venting means includes an ink absorber comprising a plurality of capillary passages.
Claim 6
Dependent Claim
17 words
A pen as in claim 4, wherein said ink absorber includes a liquid vaporizable under room temperature.
Claim 7
Dependent Claim
30 words
A pen as in claim 5, wherein said barrel comprises upper and lower sections, said upper section comprising an exchangeable ink reservoir and the upper portion of said venting means.
Claim 8
Dependent Claim
38 words
A pen as in claim 6, including a cap of flexible material positioned To seal off said upper portion of said venting means, said cap including a longitudinally extending portion capable of being punctured but normally being closed.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |