Patent US2439422A successfully refreshed from Google Patents.
US2439422A
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Assignee: Individual
•
Filing: 1943-10-25
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Granted: 1948-04-13
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Expires: 1963-10-25
Abstract
No abstract record available.
Inventors
- 👤 Fear Ralph Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:41
CPC Classifications
B; B23; B23D; B23D77/00; B23D77/06; B23D77/10; B23D2277/00; B23D2277/56; Y; Y10; Y10T; Y10T407/00; Y10T407/16; Y10T407/1628; Y10T407/1642; Y10T408/00; Y10T408/89; Y10T408/892; Y10T408/8923; Y10T408/898
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |