US2742970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for fluidizing fire-extinguishing dry chemical
Assignee: Ansul Chemical Co
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Filing: 1952-12-23
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Granted: 1956-04-24
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Expires: 1972-12-23
Abstract
No abstract record available.
Inventors
- 👤 Merritt R Bauman
- 👤 Alden W Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:37
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN APPARATUS FOR SUPPLYING GAS-FLUIDIZED DRY CHEMICAL AT A SUBSTANTIALLY CONSTANT RATIO OF GAS TO DRY CHEMICAL WHICH COMPRISES A CHAMBER FOR STORING DRY CHEMICAL THEREIN, AN OUTLET IN SAID CHAMBER, A SOURCE OF FLUIDIZING GAS PRESSURE CONNECTED TO THE BOTTOM OF SAID CHAMBER, AND A SECOND SOURCE OF GAS PRESSURE CONNECTED TO THE UPPER PORTION OF SAID CHAMBER TO MAINTAIN A SUBSTANTIALLY CONSTANT PRESSURE IN SAID CHAMBER WHILE THE FLUIDIZED DRY CHEMICAL IS BEING DISCHARGED FROM SAID CHAMBER AT A SUBSTANTIALLY CONSTANT RATIO OF GAS TO DRY CHEMICAL.
Claim 2
Independent Claim
89 words
AN APPARATUS FOR SUPPLYING GAS-FLUIDIZED DRY CHEMICAL AT A SUBSTANTIALLY CONSTANT RATIO OF GAS TO DRY CHEMICAL WHICH COMPRISES A CHAMBER FOR STORING DRY CHEMICAL THEREIN, AN OUTLET IN SAID CHAMBER, A SOURCE OF FLUIDIZING GAS PRESSURE CONNECTED TO THE BOTTOM OF SAID CHAMBER, AND A SECOND SOURCE OF GAS PRESSURE CONNECTED TO THE UPPER PORTION OF SAID CHAMBER TO MAINTAIN A SUBSTANTIALLY CONSTANT PRESSURE IN SAID CHAMBER WHILE THE FLUIDIZED DRY CHEMICAL IS BEING DISCHARGED FROM SAID CHAMBER AT A SUBSTANTIALLY CONSTANT RATIO OF GAS TO DRY CHEMICAL.
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) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |