US2794686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air flow conveying system
Assignee: Whirl-Air-Flow Corp
•
Filing: 1955-10-31
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Granted: 1957-06-04
•
Expires: 1975-10-31
Abstract
No abstract record available.
Inventors
- 👤 George W Anselman
- 👤 Gilbert A Babcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:30
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/14; B22C5/16; B65; B65G; B65G53/00; B65G53/34; B65G53/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2404203A
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US2714043A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |