US2618906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass melting furnace
Assignee: Selas Corp of America
•
Filing: 1945-09-14
•
Granted: 1952-11-25
•
Expires: 1965-09-14
Abstract
No abstract record available.
Inventors
- 👤 Frederic O Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
C; C03; C03B; C03B7/00; C03B7/02; C03B7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1661836A
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US1953407A
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US1991331A
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US2139770A
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US2215079A
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US2139911A
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US2331946A
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US2282554A
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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) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |