Patent US1617161A successfully refreshed from Google Patents.
US1617161A
Expired / Lapsed
US
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Process of preparing metals
Assignee: General Electric Co
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Filing: 1923-03-13
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Granted: 1927-02-08
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Expires: 1943-03-13
Abstract
No abstract record available.
Inventors
- 👤 Koref Fritz
- 👤 Hoffmann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:02
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982
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) | 1930-02-07 | 1930-08-09 | 1931-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-02-07 | 1934-08-09 | 1935-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-02-07 | 1938-08-09 | 1939-02-08 | $7700.00 | Window Closed / Lapsed |