US2970341A
Expired / Lapsed
US
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Extruder with adjustable choke
Assignee: National Rubber Machinery Co
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Filing: 1957-11-27
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Granted: 1961-02-07
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Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Mallory
- 👤 Eugene E Heston
- 👤 Robert H Kline
- 👤 Raymond L Christy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:34
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/395; B29C48/505; B29C48/63; B29C48/68; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/9258; B29C2948/926; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92885; B29C48/03; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 0
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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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |