Patent US2774732A successfully refreshed from Google Patents.
US2774732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operation of cation exchange units
Assignee: Permutit Co
•
Filing: 1951-06-14
•
Granted: 1956-12-18
•
Expires: 1971-06-14
Abstract
No abstract record available.
Inventors
- 👤 Blight Frank Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:52
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/80; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS OF DETERMINING WHEN ANY ONE OF AT LEAST TWO HYDROGEN CATION EXCHANGE UNITS OPERATING IN PARALLEL REQUIRES REGENERATION WHICH COMPRISES, COMPARING THE CONDUCTIVITY OF THE COMBINED EFFLUENTS FROM SAID UNITS, WITH THE CONDUCTIVITY OF THE EFFLUENT FROM SAID ONE UNIT, AND REGENERATING SAID ONE UNIT WHEN THE CONDUCTIVITY OF ITS EFFLUENT BECOMES SUBSTANTIALLY LOWER THAN THE CONDUCTIVITY OF THE COMBINED EFFLUENTS.
Claim 2
Dependent Claim
63 words
A PROCESS OF DETERMINING WHEN ANY ONE OF AT LEAST TWO HYDROGEN CATION EXCHANGE UNITS OPERATING IN PARALLEL REQUIRES REGENERATION WHICH COMPRISES, COMPARING THE CONDUCTIVITY OF THE COMBINED EFFLUENTS FROM SAID UNITS, WITH THE CONDUCTIVITY OF THE EFFLUENT FROM SAID ONE UNIT, AND REGENERATING SAID ONE UNIT WHEN THE CONDUCTIVITY OF ITS EFFLUENT BECOMES SUBSTANTIALLY LOWER THAN THE CONDUCTIVITY OF THE COMBINED EFFLUENTS.
References Cited (Backward Citations)
US1145509A
Cited
US1388613A
Cited
US1708958A
Cited
US2003760A
Cited
US2315223A
Cited
US2404367A
Cited
GB569660A
Cited
US2617766A
Cited
US2628194A
Cited
US2711995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |