US2512206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric salt bath furnace
Assignee: Individual
•
Filing: 1947-09-09
•
Granted: 1950-06-20
•
Expires: 1967-09-09
Abstract
No abstract record available.
Inventors
- 👤 Artemas F Holden
- 👤 Albert G Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:57
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/44; C21D1/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1655324A
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US1741469A
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US2014615A
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GB529891A
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US2253981A
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GB557262A
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US2397445A
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US2464008A
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CH225662A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |