US3031233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for fluidizing and conveying fluent particles of material
Assignee: Vac-U-Max
•
Filing: 1960-05-11
•
Granted: 1962-04-24
•
Expires: 1980-05-11
Abstract
No abstract record available.
Inventors
- 👤 Frank P Pendleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:15
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US337388A
Cited
US528418A
Cited
US530829A
Cited
US661609A
Cited
US1150317A
Cited
GB191504814A
Cited
US1640583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |