Patent US1916404A successfully refreshed from Google Patents.
Patent US1397694A successfully refreshed from Google Patents.
US1397694A
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Means for controlling temperatures
Assignee: ELECTRO THERMOPHORE Co
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Filing: 1919-05-21
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Granted: 1921-11-22
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Expires: 1939-05-21
Abstract
No abstract record available.
Inventors
- 👤 Lidberg Tiodolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:05
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0227; H05B1/023; H05B1/025
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) | 1924-11-21 | 1925-05-23 | 1925-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-21 | 1929-05-23 | 1929-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-21 | 1933-05-23 | 1933-11-22 | $7700.00 | Window Closed / Lapsed |