US3674407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion press and barrel
Assignee: United States Department of the Navy
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Filing: 1970-11-16
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Granted: 1972-07-04
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Expires: 1990-11-16
Abstract
Abstract A PRESS AND INTERCHANGABLE BARREL FOR EXTRUDING EXPLOSIVE AND PLASTIC MATERIALS IN CONTINUOUS STRANDS OF PREDETERMINED CROSS-SECTION. THE BARREL, WHICH CONTAINS THE RAW MATERIAL TO BE WORKED UPON, IS HELD AT A UNIFORM TEMPERATURE BY A COIL. A COUNTER FLOW OF HEATING OR COOLING FLUID IS PROVIDED IN THE COIL BY WRAPPING IT AROUND THE BARREL SUCH THAT IT TURNS BACK UPON ITSELF. THIS PROVISION OF COUNTER FLOW, IN THE COIL, PERMITS PERCISE TEMPERATURE TO BE HELD. THE MASS OF THE BARREL WALL ALSO AIDS IN MAINTAINING A UNIFORM BARREL TEMPERATURE.
Inventors
- 👤 Herbert M Neuhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:42
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0075; B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/475; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |