Patent US2441476A successfully refreshed from Google Patents.
US2441476A
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Reinforced structural sheet
Assignee: Glenn L Martin Co
•
Filing: 1944-08-10
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Granted: 1948-05-11
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Expires: 1964-08-10
Abstract
No abstract record available.
Inventors
- 👤 Ewald William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:03
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/3405; B; B21; B21D; B21D13/00; B21D13/04; B21H; B21H8/00; B21H8/005; E04C2002/3411; E04C2002/3433; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49622; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/1241; Y10T428/12417
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE221393C
Cited
US107752A
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US213635A
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US1000694A
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US1154254A
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US1499985A
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US1995057A
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GB468180A
Cited
US2292372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |