US2547755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Billet heating
Assignee: Selas Corp of America
•
Filing: 1947-07-29
•
Granted: 1951-04-03
•
Expires: 1967-07-29
Abstract
No abstract record available.
Inventors
- 👤 Frederic O Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:26
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1723538A
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US712386A
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US957998A
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US1659550A
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US1691349A
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US1890065A
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US1915949A
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US2146410A
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US2215080A
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US2214421A
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US2465306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |