US2942741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control system for particulate material
Assignee: California Research LLC
•
Filing: 1954-02-01
•
Granted: 1960-06-28
•
Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Milton A Ausman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:39
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/001
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2631242A
Cited
US1971716A
Cited
US2453456A
Cited
US2491445A
Cited
US2613832A
Cited
US2529583A
Cited
US2616521A
Cited
US2571277A
Cited
US2640936A
Cited
US2617941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |