Patent US2442381A successfully refreshed from Google Patents.
US2442381A
Expired / Lapsed
US
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Aerochemical device
Assignee: Individual
•
Filing: 1944-02-03
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Granted: 1948-06-01
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Expires: 1964-02-03
Abstract
No abstract record available.
Inventors
- 👤 Short Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:22
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/36; F42B12/56; F42B12/44; F42B12/46; F42B12/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1459793A
Cited
US1529962A
Cited
US1754134A
Cited
US2306321A
Cited
US2346494A
Cited
US2327365A
Cited
US2379364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |