Patent US1208756A successfully refreshed from Google Patents.
US1208756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating unit.
Assignee: Central Scientific Co
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Filing: 1914-09-19
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Granted: 1916-12-19
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Expires: 1934-09-19
Abstract
No abstract record available.
Inventors
- 👤 Achilles De Khotinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:39
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/02; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/44
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) | 1919-12-19 | 1920-06-19 | 1920-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-12-19 | 1924-06-19 | 1924-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-12-19 | 1928-06-19 | 1928-12-19 | $7700.00 | Window Closed / Lapsed |