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Patent US2541531A successfully refreshed from Google Patents.
US2541531A
Expired / Lapsed
US
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Method of producing powder metal articles
Assignee: Individual
•
Filing: 1945-01-31
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Granted: 1951-02-13
•
Expires: 1965-01-31
Abstract
No abstract record available.
Inventors
- 👤 Daniel L Morris
- 👤 Corydon M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:39
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; B22F3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1704256A
Cited
US1775358A
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US1981468A
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US1896853A
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GB470133A
Cited
US2198612A
Cited
US2275420A
Cited
US2240971A
Cited
US2287952A
Cited
US2297878A
Cited
US2341739A
Cited
US2362353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |