Patent US2941455A successfully refreshed from Google Patents.
US2941455A
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Composite grating structure
Assignee: Reliance Steel Products Co
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Filing: 1954-11-29
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Granted: 1960-06-21
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Expires: 1974-11-29
Abstract
No abstract record available.
Inventors
- 👤 Nagin Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:34
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; E; E01; E01D; E01D19/00; E01D19/12; E01D19/125; E01D2101/00; E01D2101/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR519055A
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US1665846A
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US2077749A
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GB455470A
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GB513453A
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US2246898A
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US2319468A
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US2265735A
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US2512996A
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US2670060A
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US2747474A
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US2735829A
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US2718829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |