Patent US1973505A successfully refreshed from Google Patents.
Patent US1930684A successfully refreshed from Google Patents.
US1930684A
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US
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Method of manufacturing bronze colors
Assignee: HARTSTOFF METALL AG
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Filing: 1930-09-29
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Granted: 1933-10-17
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Expires: 1950-09-29
Abstract
No abstract record available.
Inventors
- 👤 Kramer Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/04; B02; B02C; B02C17/00; B02C17/18; B02C23/00; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/308
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) | 1936-10-16 | 1937-04-17 | 1937-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-16 | 1941-04-17 | 1941-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-16 | 1945-04-17 | 1945-10-17 | $7700.00 | Window Closed / Lapsed |