Patent US3765780A successfully refreshed from Google Patents.
US3765780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing implements
Assignee: Individual
•
Filing: 1972-06-19
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Granted: 1973-10-16
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Expires: 1992-06-19
Abstract
Abstract Combination of ball point pen at one end of an elongated body and sharpened lead pencil at another end, the lead being in sharpened cartridge form storable in the body.
Inventors
- 👤 B Guu
- 👤 H Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:33
CPC Classifications
B; B43; B43K; B43K27/00; B43K27/02; B43K21/00; B43K21/003; B43K23/00; B43K23/08; B43K23/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A writing implement comprising a tubular casing, ball pen writing means detachably engaged into one end of said casing, lead writing means detachably engaged into the other end of said casing, said ball pen having a tube insertable in said casing, support means formed on said tube, a plurality of lead writing means held by said supporting means, a first clamp means engageable with said casing and for holding said lead writing means and a second means for closing said clamp means thereby to hold said lead writing means firmly for writing use, and caps provided at both said ends.
Claim 2
Dependent Claim
100 words
A writing implement comprising a tubular casing, ball pen writing means detachably engaged into one end of said casing, lead writing means detachably engaged into the other end of said casing, said ball pen having a tube insertable in said casing, support means formed on said tube, a plurality of lead writing means held by said supporting means, a first clamp means engageable with said casing and for holding said lead writing means and a second means for closing said clamp means thereby to hold said lead writing means firmly for writing use, and caps provided at both said ends.
Claim 3
Dependent Claim
31 words
Writing implement of claim 1, wherein said casing has slots in the inner wall thereof shaped to hold said tube and said support means with said lead writing means contained therein.
Claim 4
Dependent Claim
16 words
Writing implement of claim 1, wherein said lead writing means are sharpened at both ends thereof.
Claim 5
Dependent Claim
25 words
Writing implement of claim 1, wherein said support means comprises a plurality of sets of clamps, said clamps being useable for holding said writing means.
Claim 6
Dependent Claim
15 words
Writing implement of claim 4, wherein said clamp sets are integrally formed upon said tube.
Claim 7
Dependent Claim
16 words
Writing implement of claim 4, wherein said sets of clamps each has a plurality of clamps.
Claim 8
Dependent Claim
16 words
Writing implement of claim 1, wherein said caps are shaped to be engageable with one another.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |