Patent US2191936A successfully refreshed from Google Patents.
US2191936A
Expired / Lapsed
US
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Manufacture of porous iron articles
Assignee: Motors Liquidation Co
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Filing: 1938-03-10
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Granted: 1940-02-27
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Expires: 1958-03-10
Abstract
No abstract record available.
Inventors
- 👤 Fritz V Lenel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:08
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/24; B22F3/26; Y; Y10; Y10S; Y10S29/00; Y10S29/031
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) | 1943-02-26 | 1943-08-28 | 1944-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-26 | 1947-08-28 | 1948-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-26 | 1951-08-28 | 1952-02-27 | $7700.00 | Window Closed / Lapsed |