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US2515086A
Expired / Lapsed
US
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Heat-treating apparatus
Assignee: Selas Corp of America
•
Filing: 1946-09-18
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Granted: 1950-07-11
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Expires: 1966-09-18
Abstract
No abstract record available.
Inventors
- 👤 Frederic O Hess
- 👤 Maud Fred
- 👤 William B Troupe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:27
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US634979A
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US736103A
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US1388575A
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US1592661A
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US1539848A
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US1958846A
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US1836337A
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US2098624A
Cited
GB492066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |