US2802724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined dry chemical dissolver and feeder
Assignee: Individual
•
Filing: 1956-04-05
•
Granted: 1957-08-13
•
Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Tom R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:30
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/44; A47L15/4436; B; B01; B01F; B01F21/00; B01F21/15; B01F21/20; Y; Y10; Y10T; Y10T137/00; Y10T137/4891
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A DEVICE OF THE CHARACTER DESCRIBED COMPRISING A TANK HAVING A DISPLACEABLE COVER FOR LOADING THE TANK; A WEIGHT DISC ASSEMBLY CONFORMED TO GENERALLY SPAN THE HORIZONTAL CROSS-SECTIONAL INTERIOR AREA OF SAID TANK BUT SUFFICIENTLY SMALLER THAN SAID AREA TO LEAVE A SPACE FOR FLUID FLOW BETWEEN THE PERIPHERY OF SAID ASSEMBLY AND THE ADJACENT SURFACE OF SAID TANK; SAID TANK HAVING SUBSTANTIALLY IMPERFORATE BOTTOM AND SIDE PORTIONS ADAPTED TO RETAIN A BODY OF MATERIAL LOADED IN SAID TANK; SAID ASSEMBLY BEING ADAPTED TO REST ON SAID BODY OF MATERIAL LOADED IN SAID TANK WHEREBY SAID BODY OF MATERIAL IS CONFINED BY AND IN DIRECT CONTACT WITH SAID ASSEMBLY, SAID BOTTOM PORTION, AND SAID SIDE PORTIONS; AND CONDUIT MEANS CONNECTED TO CONDUCT FLUID FROM A LOCATION EXTERIOR TO SAID TANK AND DELIVER SAID FLUID INTO SAID TANK FROM SAID ASSEMBLY AT A REGION BELOW THE TOP SURFACE OF SAID ASSEMBLY AGAINST ONLY THE UPPER SURFACE OF SAID MATERIAL; SAID TANK HAVING A DISCHARGE OPENING IN THE UPPER REGION THEREOF.
Claim 2
Independent Claim
169 words
A DEVICE OF THE CHARACTER DESCRIBED COMPRISING A TANK HAVING A DISPLACEABLE COVER FOR LOADING THE TANK; A WEIGHT DISC ASSEMBLY CONFORMED TO GENERALLY SPAN THE HORIZONTAL CROSS-SECTIONAL INTERIOR AREA OF SAID TANK BUT SUFFICIENTLY SMALLER THAN SAID AREA TO LEAVE A SPACE FOR FLUID FLOW BETWEEN THE PERIPHERY OF SAID ASSEMBLY AND THE ADJACENT SURFACE OF SAID TANK; SAID TANK HAVING SUBSTANTIALLY IMPERFORATE BOTTOM AND SIDE PORTIONS ADAPTED TO RETAIN A BODY OF MATERIAL LOADED IN SAID TANK; SAID ASSEMBLY BEING ADAPTED TO REST ON SAID BODY OF MATERIAL LOADED IN SAID TANK WHEREBY SAID BODY OF MATERIAL IS CONFINED BY AND IN DIRECT CONTACT WITH SAID ASSEMBLY, SAID BOTTOM PORTION, AND SAID SIDE PORTIONS; AND CONDUIT MEANS CONNECTED TO CONDUCT FLUID FROM A LOCATION EXTERIOR TO SAID TANK AND DELIVER SAID FLUID INTO SAID TANK FROM SAID ASSEMBLY AT A REGION BELOW THE TOP SURFACE OF SAID ASSEMBLY AGAINST ONLY THE UPPER SURFACE OF SAID MATERIAL; SAID TANK HAVING A DISCHARGE OPENING IN THE UPPER REGION THEREOF.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |