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US1902513A
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Method of making and hardening steel tools provided with hard metal members
Assignee: GEWERKSCHAFT WALLRAM
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Filing: 1931-08-15
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Granted: 1933-03-21
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Expires: 1951-08-15
Abstract
No abstract record available.
Inventors
- 👤 Meutsch Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/18; C; C21; C21D; C21D9/00; C21D9/22; Y; Y10; Y10S; Y10S76/00; Y10S76/05; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/26
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) | 1936-03-20 | 1936-09-19 | 1937-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-03-20 | 1940-09-19 | 1941-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-03-20 | 1944-09-19 | 1945-03-21 | $7700.00 | Window Closed / Lapsed |