US2783345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency heating applicators
Assignee: National Cylinder Gas Co
•
Filing: 1954-03-26
•
Granted: 1957-02-26
•
Expires: 1974-03-26
Abstract
No abstract record available.
Inventors
- 👤 Henry R Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:59
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2218223A
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US2215582A
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US2292798A
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US2342897A
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GB556292A
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US2465102A
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US2506626A
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US2504956A
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US2504969A
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US2504109A
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US2467782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |