Patent US2515311A successfully refreshed from Google Patents.
US2515311A
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US
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Treatment of grating structures
Assignee: Reliance Steel Products Co
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Filing: 1945-02-07
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Granted: 1950-07-18
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Expires: 1965-02-07
Abstract
No abstract record available.
Inventors
- 👤 Harry S Nagin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:30
CPC Classifications
E; E01; E01D; E01D19/00; E01D19/12; E01D19/125; E01C; E01C23/00; E01C23/06; E01C23/08; E01C23/081; E01C23/085; E01C23/088; E01D2101/00; E01D2101/30; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0304; Y10T83/0311
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1180953A
Cited
US1678362A
Cited
US1629782A
Cited
GB343692A
Cited
US2131571A
Cited
US2246216A
Cited
US2244742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |