Patent US2680304A successfully refreshed from Google Patents.
US2680304A
Expired / Lapsed
US
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Drying apparatus
Assignee: Individual
•
Filing: 1950-08-18
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Granted: 1954-06-08
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Expires: 1970-08-18
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:44
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B3/00; F26B3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE644689C
Cited
US2127956A
Cited
US2262173A
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US2325950A
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US2420399A
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US2409431A
Cited
US2315124A
Cited
US2479913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |