Patent US2758337A successfully refreshed from Google Patents.
US2758337A
Expired / Lapsed
US
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Extruder head
Assignee: AT&T Inc
•
Filing: 1952-03-01
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Granted: 1956-08-14
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Expires: 1972-03-01
Abstract
No abstract record available.
Inventors
- 👤 Ray C Kivley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:15
CPC Classifications
B; B21; B21C; B21C25/00; B21C25/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US288795A
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US1427698A
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US1770985A
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US2035247A
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US2159108A
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FR857774A
Cited
GB535692A
Cited
FR876573A
Cited
US2366528A
Cited
US2522364A
Cited
US2465482A
Cited
US2560778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |