Patent US2489820A successfully refreshed from Google Patents.
US2489820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kiln for drying lumber
Assignee: Individual
•
Filing: 1947-08-11
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Granted: 1949-11-29
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Expires: 1967-08-11
Abstract
No abstract record available.
Inventors
- 👤 Harry L Russell
- 👤 Hayward H Mcmanus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:46
CPC Classifications
F; F26; F26B; F26B9/00; F26B9/06; F26B2210/00; F26B2210/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US274910A
Cited
US1039301A
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US1432248A
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US1513932A
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US1745375A
Cited
US1989998A
Cited
US2039429A
Cited
GB411700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |