Patent US5526928A successfully refreshed from Google Patents.
Patent US2171040A successfully refreshed from Google Patents.
US2171040A
Expired / Lapsed
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Composite sheet metal body and method of producing the same
Assignee: Alcoa Corp
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Filing: 1938-08-31
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Granted: 1939-08-29
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Expires: 1958-08-31
Abstract
No abstract record available.
Inventors
- 👤 Richard S Merritt
- 👤 Keller Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:53
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02; B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B23K20/2275; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/12979
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) | 1942-08-28 | 1943-02-27 | 1943-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-28 | 1947-02-27 | 1947-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-28 | 1951-02-27 | 1951-08-29 | $7700.00 | Window Closed / Lapsed |