Patent US1974970A successfully refreshed from Google Patents.
US1974970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy
Assignee: Alcoa Corp
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Filing: 1933-08-17
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Granted: 1934-09-25
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Expires: 1953-08-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph A Nock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:57
CPC Classifications
C; C22; C22C; C22C21/00
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) | 1937-09-24 | 1938-03-26 | 1938-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-24 | 1942-03-26 | 1942-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-24 | 1946-03-26 | 1946-09-25 | $7700.00 | Window Closed / Lapsed |