Patent US2294741A successfully refreshed from Google Patents.
Patent US3258159A successfully refreshed from Google Patents.
US3258159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering and discharging apparatus
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1964-06-02
•
Granted: 1966-06-28
•
Expires: 1984-06-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert H Neville
- 👤 Elof M Ericson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:40
CPC Classifications
A; A61; A61J; A61J3/00; A61J3/07
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
THE METHOD OF METERING AND DISCHARGING A PRECISELY MEASURED QUANTITY OF DRY PARTICULATE MATERIAL COMPRISING OPENING THE TOP OF A GIVEN OTHERWISE FULLY CLOSED VOLUMETRIC METERING CHAMBER SO AS TO RECEIVE FROM A GIVEN RELATIVELY ELEVATED SOURCE OF SUPPLY A QUANTITY OF DRY PARTICULATE MATERIAL, MEANWHILE AGITATING THE DRY PARTICULATE MATERIAL AS IT IS PASSED FROM THE GIVEN SOURCE OF SUPPLY INTO THE GIVEN METERING CHAMBER TO INSURE THAT THE GIVEN METERING CHAMBER IS COMPLETELY FILLED, CLOSING THE TOP OF THE GIVEN METERING CHAMBER TO ENCLOSE A PREDETERMINED PRECISELY MEASURED QUANTITY OF DRY PARTICULATE MATERIAL, OPENING THE BOTTOM OF THE GIVEN METERING CHAMBER SO AS TO DISCHARGE THE QUANTITY OF DRY PARTICULATE MATERIAL CONTAINED BY THE GIVEN METERING CHAMBER, AND INJECTING INTO THE GIVEN METERING CHAMBER THROUGH AN
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |