US2434523A
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Assignee: Richards Wilcox Manufacturing Co
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Filing: 1944-05-08
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Granted: 1948-01-13
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Expires: 1964-05-08
Abstract
No abstract record available.
Inventors
- 👤 Carl L Sheets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:14
CPC Classifications
E; E01; E01B; E01B25/00; E01B25/22; E01B25/26; B; B65; B65G; B65G2812/00; B65G2812/02; B65G2812/02009; B65G2812/02019; B65G2812/02069; B65G2812/02079
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |