US3431599A
Expired / Lapsed
US
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Extrusion method and apparatus
Assignee: BAE Systems Space & Mission Systems Inc
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Filing: 1964-12-04
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Granted: 1969-03-11
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Expires: 1984-12-04
Abstract
No abstract record available.
Inventors
- 👤 Clement V Fogelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/80; B29C48/83; B29C48/834; B29C48/36; B29C48/50; B29C48/505; B29C48/58; B29C48/832; B29C48/875; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN EXTRUDER SCREW HAVING A PLURALITY OF FUNCTIONAL SECTIONS ALONG ITS LENGTH, INCLUDING A FEEDING SECTION HAVING A LENGTH OF BETWEEN ABOUT 33% AND 36% OF THE LENGTH OF SAID SCREW AND A FLIGHT DEPTH OF BETWEEN ABOUT 12% AND 15% OF ITS OUTSIDE FLIGHT DIAMETER, A FIRST METERING SECTION HAVING A LENGTH OF BETWEEN ABOUT 15%% AND 19% OF THE LENGTH OF SAID SCREW AND A FLIGHT DEPTH OF BETWEEN ABOUT 3% AND 5% OF ITS OUTSIDE FLIGHT DIAMETER, A VENTING SECTION HAVING A LENGTH OF BETWEEN ABOUT 15% AND 19%
Claim 2
Dependent Claim
92 words
AN EXTRUDER SCREW HAVING A PLURALITY OF FUNCTIONAL SECTIONS ALONG ITS LENGTH, INCLUDING A FEEDING SECTION HAVING A LENGTH OF BETWEEN ABOUT 33% AND 36% OF THE LENGTH OF SAID SCREW AND A FLIGHT DEPTH OF BETWEEN ABOUT 12% AND 15% OF ITS OUTSIDE FLIGHT DIAMETER, A FIRST METERING SECTION HAVING A LENGTH OF BETWEEN ABOUT 15%% AND 19% OF THE LENGTH OF SAID SCREW AND A FLIGHT DEPTH OF BETWEEN ABOUT 3% AND 5% OF ITS OUTSIDE FLIGHT DIAMETER, A VENTING SECTION HAVING A LENGTH OF BETWEEN ABOUT 15% AND 19%
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) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |