US3104030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic discharge systems
Assignee: National Gypsum Co
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Filing: 1961-03-07
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Granted: 1963-09-17
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Expires: 1981-03-07
Abstract
No abstract record available.
Inventors
- 👤 Charles L Howlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:53
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/04; B28C7/06; B28C7/062; B65; B65G; B65G53/00; B65G53/04; B65G53/16; B65G53/18; B65G53/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A PNEUMATIC DISCHARGE SYSTEM COMPRISING A CASING HAVING A MATERIAL INLET AND A MATERIAL OUTLET, A WALL POSITIONED TO DIVIDE THE CASING INTO AT LEAST A FIRST CHAMBER ADJACENT THE INLET AND A SECOND CHAMBER ADJACENT THE OUTLET, SAID WALL FORMING AT LEAST IN PART A RESTRICTED PASSAGEWAY BETWEEN THE FIRST AND SECOND CHAMBERS, A GASPERMEABLE DECK UNDERLYING EACH CHAMBER, MEANS FOR PASSING A GAS UPWARDLY THROUGH THE DECK IN EACH CHAMBER TO FLUIDIZE OVERLYING MATERIAL, MEANS FOR MAINTAINING A SUBSTANTIALLY CONSTANT LEVEL OF MATERIAL IN THE SECOND CHAMBER, A VALVE POSITIONED TO CONTROL THE FLOW OF MATERIAL FROM THE SECOND CHAMBER THROUGH THE CASING OUTLET, ACTUATING MEANS FOR SAID VALVE, AND A MATERIAL FLOW RATE SENSING ELEMENT OPERATIVELY CONNECTED TO AND CONTROLLING THE ACTUATION MEANS FOR SAID VALVE.
Claim 2
Dependent Claim
129 words
A PNEUMATIC DISCHARGE SYSTEM COMPRISING A CASING HAVING A MATERIAL INLET AND A MATERIAL OUTLET, A WALL POSITIONED TO DIVIDE THE CASING INTO AT LEAST A FIRST CHAMBER ADJACENT THE INLET AND A SECOND CHAMBER ADJACENT THE OUTLET, SAID WALL FORMING AT LEAST IN PART A RESTRICTED PASSAGEWAY BETWEEN THE FIRST AND SECOND CHAMBERS, A GASPERMEABLE DECK UNDERLYING EACH CHAMBER, MEANS FOR PASSING A GAS UPWARDLY THROUGH THE DECK IN EACH CHAMBER TO FLUIDIZE OVERLYING MATERIAL, MEANS FOR MAINTAINING A SUBSTANTIALLY CONSTANT LEVEL OF MATERIAL IN THE SECOND CHAMBER, A VALVE POSITIONED TO CONTROL THE FLOW OF MATERIAL FROM THE SECOND CHAMBER THROUGH THE CASING OUTLET, ACTUATING MEANS FOR SAID VALVE, AND A MATERIAL FLOW RATE SENSING ELEMENT OPERATIVELY CONNECTED TO AND CONTROLLING THE ACTUATION MEANS FOR SAID VALVE.
References Cited (Backward Citations)
US2331208A
Cited
GB772125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |