US2470744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air lock and valve for pneumatic conveying systems
Assignee: AIRBORNE CONVEYORS Corp
•
Filing: 1945-10-22
•
Granted: 1949-05-17
•
Expires: 1965-10-22
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Korn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:05
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4675; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1861726A
Cited
US1709949A
Cited
GB360943A
Cited
US1873138A
Cited
US1970021A
Cited
US1943589A
Cited
US2071197A
Cited
US2060748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |