US2745552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter with fractional crystallization means
Assignee: Individual
•
Filing: 1953-09-02
•
Granted: 1956-05-15
•
Expires: 1973-09-02
Abstract
No abstract record available.
Inventors
- 👤 Warren H Bruggeman
- 👤 Bertram G Voorhees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:51
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10; B; B01; B01D; B01D29/00; B01D29/11; G; G21; G21C; G21C15/00; G21C15/28; G21C19/00; G21C19/28; G21C19/30; G21C19/307; G21C19/31; G21C19/313; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A COLD TRAP FOR REMOVING FROM A LIQUID STREAM AN IMPURITY WHOSE SOLUBILITY IN THE LIQUID CHANGES WITH TEMPERATURE; COMPRISING A HEAT EXCHANGER, INLET AND OUTLET MEANS IN SAID HEAT EXCHANGER FOR INLET AND OUTLET STREAMS OF SAID LIQUID, MEANS WITHIN THE HEAT EXCHANGER FOR BRINGING THE INLET STREAM INTO HEAT EXCHANGE RELATIONSHIP WITH THE OUTLET STREAM, A HOLDUP TANK, BAFFLE MEANS DIVIDING THE INTERIOR OF THE TANK INTO AN ANNULAR INLET ZONE AND A CENTRAL WELL, METAL WOOL IN THE ANNULAR ZONE AND CENTRAL WELL, COOLING MEANS AROUND THE EXTERIOR OF THE TANK ADJACENT THE ANNULAR ZONE THEREOF, CONDUIT MEANS CONNECTING THE ANNULAR ZONE WITH THE INLET STREAM IN THE HEAT EXCHANGER, AND CONDUIT MEANS CONNECTING THE CENTRAL WELL WITH THE OUTLET STREAM IN THE HEAT EXCHANGER.
Claim 2
Dependent Claim
128 words
A COLD TRAP FOR REMOVING FROM A LIQUID STREAM AN IMPURITY WHOSE SOLUBILITY IN THE LIQUID CHANGES WITH TEMPERATURE; COMPRISING A HEAT EXCHANGER, INLET AND OUTLET MEANS IN SAID HEAT EXCHANGER FOR INLET AND OUTLET STREAMS OF SAID LIQUID, MEANS WITHIN THE HEAT EXCHANGER FOR BRINGING THE INLET STREAM INTO HEAT EXCHANGE RELATIONSHIP WITH THE OUTLET STREAM, A HOLDUP TANK, BAFFLE MEANS DIVIDING THE INTERIOR OF THE TANK INTO AN ANNULAR INLET ZONE AND A CENTRAL WELL, METAL WOOL IN THE ANNULAR ZONE AND CENTRAL WELL, COOLING MEANS AROUND THE EXTERIOR OF THE TANK ADJACENT THE ANNULAR ZONE THEREOF, CONDUIT MEANS CONNECTING THE ANNULAR ZONE WITH THE INLET STREAM IN THE HEAT EXCHANGER, AND CONDUIT MEANS CONNECTING THE CENTRAL WELL WITH THE OUTLET STREAM IN THE HEAT EXCHANGER.
References Cited (Backward Citations)
US435971A
Cited
US1013761A
Cited
US1840510A
Cited
US2373257A
Cited
US2414680A
Cited
US2432475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |