US2271022A
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Assignee: EDNA HANSON
•
Filing: 1940-08-29
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Granted: 1942-01-27
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Expires: 1960-08-29
Abstract
No abstract record available.
Inventors
- 👤 Clarence D Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:51
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/12; F04B9/123; F04B9/1235; F01; F01L; F01L23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-01-26 | 1945-07-28 | 1946-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-26 | 1949-07-28 | 1950-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-26 | 1953-07-28 | 1954-01-27 | $7700.00 | Window Closed / Lapsed |