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US2648231A
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Assignee: Individual
•
Filing: 1947-05-26
•
Granted: 1953-08-11
•
Expires: 1967-05-26
Abstract
No abstract record available.
Inventors
- 👤 Everett R Windahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/2004; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US790765A
Cited
US972296A
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US970974A
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US1556574A
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FR708802A
Cited
US2014905A
Cited
US2040594A
Cited
US2252080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |