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Patent US1752471A successfully refreshed from Google Patents.
US1752471A
Expired / Lapsed
US
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Extrusion machine
Assignee: AT&T Inc
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Filing: 1924-05-24
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Granted: 1930-04-01
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Expires: 1944-05-24
Abstract
No abstract record available.
Inventors
- 👤 Trebes Bruno Max Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/365; B29C48/37; B29C48/03; B29C48/07; B29C48/08
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) | 1933-03-31 | 1933-09-30 | 1934-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-03-31 | 1937-09-30 | 1938-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-03-31 | 1941-09-30 | 1942-04-01 | $7700.00 | Window Closed / Lapsed |