Patent US2239421A successfully refreshed from Google Patents.
US1936301A
Expired / Lapsed
US
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Assignee: Elkhart Brass Manufacturing Co LLC
•
Filing: 1932-11-16
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Granted: 1933-11-21
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Expires: 1952-11-16
Abstract
No abstract record available.
Inventors
- 👤 Edward H Hansen
- 👤 Elwood E Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/52; F16K1/523; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1669; Y10T137/8158; Y10T137/8225; Y10T137/8811
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) | 1936-11-20 | 1937-05-22 | 1937-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-20 | 1941-05-22 | 1941-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-20 | 1945-05-22 | 1945-11-21 | $7700.00 | Window Closed / Lapsed |