Patent US3187947A successfully refreshed from Google Patents.
US3187947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical proportioner
Assignee: Skasol Inc
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Filing: 1963-04-12
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Granted: 1965-06-08
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Expires: 1983-04-12
Abstract
No abstract record available.
Inventors
- 👤 Charles A Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:01
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/687
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A LIQUID HANDLING SYSTEM HAVING A BODY OF LIQUID WITH A VARIABLE LIQUID LEVEL, A LIQUID INLET CONDUIT FOR DELIVERING REPLACEMENT LIQUID TO SAID BODY OF LIQUID, AND A LIQUID LEVEL RESPONSIVE VALVE IN SAID INLET CONDUIT FOR INCREASING THE VOLUME OF LIQUID DELIVERED FROM SAID INLET CONDUIT RESPONSIVE TO REDUCTION IN THE LIQUID LEVEL OF SAID BODY OF LIQUID, THE IMPROVED MEANS FOR MAINTAINING A PREDETERMINED CONCENTRATION OF A CHEMICAL TREATING AGENT IN SAID BODY OF LIQUID WHICH COMPRISES: (A) PRESSURE DISCHARGE MEANS CONNECTED TO SAID INLET CONDUIT FOR INCREASING THE PRESSURE OF LIQUID DELIVERED FROM SAID INLET CONDUIT RESPONSIVE TO INCREASES IN THE VOLUME OF SAID LIQUID, SAID PRESSURE DISCHARGE MEANS HAVING (1) A CHAMBER COMMUNICATING WITH SAID INLET CONDUIT AND (2) PERMANENTLY OPEN OUTLET MEANS FOR LIQUID
Claim 2
Dependent Claim
131 words
IN A LIQUID HANDLING SYSTEM HAVING A BODY OF LIQUID WITH A VARIABLE LIQUID LEVEL, A LIQUID INLET CONDUIT FOR DELIVERING REPLACEMENT LIQUID TO SAID BODY OF LIQUID, AND A LIQUID LEVEL RESPONSIVE VALVE IN SAID INLET CONDUIT FOR INCREASING THE VOLUME OF LIQUID DELIVERED FROM SAID INLET CONDUIT RESPONSIVE TO REDUCTION IN THE LIQUID LEVEL OF SAID BODY OF LIQUID, THE IMPROVED MEANS FOR MAINTAINING A PREDETERMINED CONCENTRATION OF A CHEMICAL TREATING AGENT IN SAID BODY OF LIQUID WHICH COMPRISES: (A) PRESSURE DISCHARGE MEANS CONNECTED TO SAID INLET CONDUIT FOR INCREASING THE PRESSURE OF LIQUID DELIVERED FROM SAID INLET CONDUIT RESPONSIVE TO INCREASES IN THE VOLUME OF SAID LIQUID, SAID PRESSURE DISCHARGE MEANS HAVING (1) A CHAMBER COMMUNICATING WITH SAID INLET CONDUIT AND (2) PERMANENTLY OPEN OUTLET MEANS FOR LIQUID
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |