Patent US1637167A successfully refreshed from Google Patents.
US1637167A
Expired / Lapsed
US
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Electrical heating body for high temperatures especially for ceramic metallurgical processes and chemical processes
Assignee: STUDIENGESELLSCHAFT fur WIRTS
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Filing: 1925-08-24
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Granted: 1927-07-26
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Expires: 1945-08-24
Abstract
No abstract record available.
Inventors
- 👤 Weckerle Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:48
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/141
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) | 1930-07-25 | 1931-01-24 | 1931-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-07-25 | 1935-01-24 | 1935-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-07-25 | 1939-01-24 | 1939-07-26 | $7700.00 | Window Closed / Lapsed |