Patent US1891740A successfully refreshed from Google Patents.
US1891740A
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Extruded shapes with interlocked joints and method of making
Assignee: American Brass Co
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Filing: 1930-11-18
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Granted: 1932-12-20
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Expires: 1950-11-18
Abstract
No abstract record available.
Inventors
- 👤 George F Westerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:51
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/14; B21C23/142; B21C23/145; Y; Y10; Y10S; Y10S160/00; Y10S160/12; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49936; Y10T428/00; Y10T428/12; Y10T428/12326; Y10T428/1241; Y10T428/12451
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) | 1935-12-20 | 1936-06-20 | 1936-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-12-20 | 1940-06-20 | 1940-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-12-20 | 1944-06-20 | 1944-12-20 | $7700.00 | Window Closed / Lapsed |