US3020032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum furnace
Assignee: Selas Corp of America
•
Filing: 1959-04-06
•
Granted: 1962-02-06
•
Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 Robert J Casey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:06
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/773
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2041312A
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US2091979A
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US2161162A
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US2371278A
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US2169966A
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GB539572A
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US2276971A
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US2476916A
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US2638426A
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US2744629A
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US2707719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |