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US2217785A
Expired / Lapsed
US
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Thermoelectrically controlled device
Assignee: Consolidated Gas Electric Light and Power Company of Baltimore
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Filing: 1937-11-22
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Granted: 1940-10-15
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Expires: 1957-11-22
Abstract
No abstract record available.
Inventors
- 👤 Paul L Betz
- 👤 Karrer Sebastian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:12
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/24; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516; Y10T137/2496; Y10T137/2511
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) | 1943-10-15 | 1944-04-15 | 1944-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-15 | 1948-04-15 | 1948-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-15 | 1952-04-15 | 1952-10-15 | $7700.00 | Window Closed / Lapsed |