Patent US2450280A successfully refreshed from Google Patents.
US2450280A
Expired / Lapsed
US
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Method of making metal sponges
Assignee: Springfield Wire & Tinsel Co
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Filing: 1945-01-08
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Granted: 1948-09-28
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Expires: 1965-01-08
Abstract
No abstract record available.
Inventors
- 👤 Albert J Homon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:00
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/02; A47L13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1689093A
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US1976491A
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US1991023A
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US1991024A
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US1995808A
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US1995809A
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US2138787A
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US2121527A
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US2240185A
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US2287879A
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US2265369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |