Patent US1898489A successfully refreshed from Google Patents.
US1898489A
Expired / Lapsed
US
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Electrical apparatus
Assignee: Siemens Schuckertwerke AG
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Filing: 1930-10-08
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Granted: 1933-02-21
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Expires: 1950-10-08
Abstract
No abstract record available.
Inventors
- 👤 Kieffer Emil Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:03
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/18; H02K1/185; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
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) | 1936-02-21 | 1936-08-22 | 1937-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-21 | 1940-08-22 | 1941-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-21 | 1944-08-22 | 1945-02-21 | $7700.00 | Window Closed / Lapsed |