US3740159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Point protectors for writing implements
Assignee: Individual
•
Filing: 1970-10-21
•
Granted: 1973-06-19
•
Expires: 1990-10-21
Abstract
Abstract There is disclosed in the present application a point protector for a writing implement such as a ball point pen, which is moldable with internal retaining and indexing projections, The molding operation and the mold for the production of the protector are simplified by providing openings in alignment with the projections through which stationary core rods are introduced into the mold cavity.
Inventors
- 👤 Romanoff E Smagala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A readily moldable point protector adapted for captive mounting upon the working end of a writing implement comprising a unitary elongated shell of molded plastic material open at one end defined by a wall free of open-ended slots and substantially closed at the other end, a central perforation in the closed end, a pawl of limited circumferential extent formed on the interior of one shell intermediate the ends, an internal detent projection angularly separated from the pawl about the axis of the shell and farther than the pawl from the closed end, a first mold member access opening in addition to the central perforation through the closed end in alignment with the pawl, the first opening being of a size at least equal to the maximum cross-sectional area of the pawl and a second mold member access opening in alignment with the detent projection and of a size at least equal to the maximum cross-sectional area of the projection, whereby undercut surfaces of the pawl and projection may be readily stripped from the mold.
Claim 2
Dependent Claim
174 words
A readily moldable point protector adapted for captive mounting upon the working end of a writing implement comprising a unitary elongated shell of molded plastic material open at one end defined by a wall free of open-ended slots and substantially closed at the other end, a central perforation in the closed end, a pawl of limited circumferential extent formed on the interior of one shell intermediate the ends, an internal detent projection angularly separated from the pawl about the axis of the shell and farther than the pawl from the closed end, a first mold member access opening in addition to the central perforation through the closed end in alignment with the pawl, the first opening being of a size at least equal to the maximum cross-sectional area of the pawl and a second mold member access opening in alignment with the detent projection and of a size at least equal to the maximum cross-sectional area of the projection, whereby undercut surfaces of the pawl and projection may be readily stripped from the mold.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |