US2473539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency drying
Assignee: Guardite Corp
•
Filing: 1944-11-02
•
Granted: 1949-06-21
•
Expires: 1964-11-02
Abstract
No abstract record available.
Inventors
- 👤 Charles J Merriam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:43
CPC Classifications
F; F26; F26B; F26B3/00; F26B3/32; F26B3/34; Y; Y10; Y10S; Y10S159/00; Y10S159/06; Y10S159/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1668591A
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US2042145A
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US2054937A
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US1972050A
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US2098295A
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US2231457A
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US2130154A
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US2408434A
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US2419875A
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US2419876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |