Patent US4729321A successfully refreshed from Google Patents.
US4729321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell having pyramid shaped shot
Assignee: Individual
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Filing: 1987-06-24
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Granted: 1988-03-08
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Expires: 2007-06-24
Abstract
Abstract A shell formed of a cylindrical casing having a reduced diameter cylindrical package of explosive contained therein and means to ignite the explosive and a plurality of metallic pellets positioned in the annular area between the explosive and the casing, each pellet being in the form of a polyhedron having a polygonal base and triangular faces meeting in a common apex, the base and all faces being equally dimensioned and shaped.
Inventors
- 👤 Gilbert A. Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:59
CPC Classifications
F; F42; F42B; F42B7/00; F42B7/02; F42B7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A shell comprising: a cylindrical casing; an explosive contained within a concentric cylindrical package of reduced external diameter within said cylindrical casing; means to ignite said explosive; and a plurality of metallic pellets positioned in the annular area between said explosive and said casing, said pellets each being in the form of a polyhedron having a polygonal base and triangular faces meeting in a common apex, the base and all faces being equally dimensioned and shaped.
Claim 2
Dependent Claim
76 words
A shell comprising: a cylindrical casing; an explosive contained within a concentric cylindrical package of reduced external diameter within said cylindrical casing; means to ignite said explosive; and a plurality of metallic pellets positioned in the annular area between said explosive and said casing, said pellets each being in the form of a polyhedron having a polygonal base and triangular faces meeting in a common apex, the base and all faces being equally dimensioned and shaped.
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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |