US2671690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forced air sprayer and duster
Assignee: Individual
•
Filing: 1948-02-21
•
Granted: 1954-03-09
•
Expires: 1968-02-21
Abstract
No abstract record available.
Inventors
- 👤 Ehrenkrook Karl Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:12
CPC Classifications
A; A01; A01M; A01M7/00; A01M7/0003; A01M7/0014; A01M11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1859567A
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US1864198A
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US2220082A
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US2297110A
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US2331107A
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US2279495A
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US2253802A
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US2374955A
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US2583753A
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US2429374A
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US2583560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |