Patent US2044481A successfully refreshed from Google Patents.
US2044481A
Expired / Lapsed
US
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Material working machine
Assignee: AT&T Inc
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Filing: 1934-12-08
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Granted: 1936-06-16
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Expires: 1954-12-08
Abstract
No abstract record available.
Inventors
- 👤 Lloyd M Manley
- 👤 Rollin H Mccarthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:33
CPC Classifications
B; B23; B23D; B23D59/00; B23D59/006; B23D59/0064; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S29/00; Y10S29/064; Y10S29/086
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) | 1939-06-16 | 1939-12-16 | 1940-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-06-16 | 1943-12-16 | 1944-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-06-16 | 1947-12-16 | 1948-06-16 | $7700.00 | Window Closed / Lapsed |