US3706256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ammunition
Assignee: Individual
•
Filing: 1970-10-15
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Granted: 1972-12-19
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Expires: 1990-10-15
Abstract
Abstract The method of making ammunition in which a steel metal skeleton is blanked or stamped to provide a central hub and radially extending fingers. The fingers are then formed to extend in a direction normal to the hub and in a peripherally spaced relationship with each other. The blanked and formed skeleton is laminated with a reinforced plastic material and the ends of the laminated fingers are necked. A primer is seated in the hub, a projectile is secured and sealed to the laminated fingers, and the laminated skeleton is loaded with propellants.
Inventors
- 👤 Andrew J Grandy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:36
CPC Classifications
F; F42; F42B; F42B5/00; F42B5/26; F42B5/30; F42B5/307
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
The method of producing a cartridge case for ammunition comprising the steps of blanking a steel metal skeleton having a central hub portion and a plurality of elongated fingers of substantially equal length extending radially therefrom die forming said fingers to extend in a direction substantially normal to said hub portion and in a substantially peripherally spaced relationship with each other, and laminating said blanked and formed metallic skeleton with a reinforced plastic material.
Claim 2
Independent Claim
74 words
The method of producing a cartridge case for ammunition comprising the steps of blanking a steel metal skeleton having a central hub portion and a plurality of elongated fingers of substantially equal length extending radially therefrom die forming said fingers to extend in a direction substantially normal to said hub portion and in a substantially peripherally spaced relationship with each other, and laminating said blanked and formed metallic skeleton with a reinforced plastic material.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said laminating step includes winding a high strength monofilament around the group of formed fingers, said monofilament having a coating of thermosetting resin molded thereon.
Claim 4
Dependent Claim
47 words
The method of producing ammunition comprising the steps in accordance with claim 1 and further necking end portions of said laminated fingers, seating a primer in the laminated skeleton hub portion, securing and sealing a projectile to said laminated fingers, and loading said laminated skeleton with propellant.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |