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US2487475A
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Assignee: SPENAX Corp A CORP OF INDIANA
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Filing: 1948-02-24
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Granted: 1949-11-08
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Expires: 1968-02-24
Abstract
No abstract record available.
Inventors
- 👤 Richard E Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:59
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/146; B68; B68G; B68G15/00; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53709; Y10T29/53783
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US689721A
Cited
US1163617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |