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US1722371A
Expired / Lapsed
US
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Piston-casting machine
Assignee: Alcoa Corp
•
Filing: 1926-02-12
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Granted: 1929-07-30
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Expires: 1946-02-12
Abstract
No abstract record available.
Inventors
- 👤 Frank L Feltes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:52
CPC Classifications
B; B22; B22D; B22D15/00; B22D15/02; Y; Y10; Y10S; Y10S164/00; Y10S164/08
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) | 1932-07-29 | 1933-01-28 | 1933-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-29 | 1937-01-28 | 1937-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-29 | 1941-01-28 | 1941-07-30 | $7700.00 | Window Closed / Lapsed |