US2839411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the purification of crystals
Assignee: Phillips Petroleum Co
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Filing: 1955-10-26
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Granted: 1958-06-17
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Expires: 1975-10-26
Abstract
No abstract record available.
Inventors
- 👤 Macedonio A Vela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:39
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01D9/0063; C07C255/00; C07C29/00; C07C29/74; C07C29/76; C07C29/78; C07C46/00; C07C46/10; C07C67/00; C07C67/48; C07C67/52; C07C7/00; C07C7/14; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN A PROCESS WHEREIN CRYSTALS ARE PURIFIED, WHICH PROCESS COMPRISES, PASSING CRYSTALS THROUGH A FILTRATION SECTION AND A RELFUX SECTION INTO A MELTING SECTION OF A PURIFICATION ZONE, MELTING CRYSTALS IN SAID MELTING SECTION, WITHDRAWING A PORTION OF THE RESULTING MELT, AND PASSING ANOTHER PORTION OF SAID MELT INTO SAID REFLUX SECTION IN A DIRECTION COUNTERCURRENT TO THE MOVEMENT OF CRYSTALS THERETHROUGH, THE IMPROVEMENT WHICH OMPRISES, ALTERNATELY PASSING A FIRST STREAM OF SAID CRYSTALS THROUGH A FIRST PURIFICATION ZONE AND THEN PASSING A SECOND STREAM OF SAID CRYSTALS THROUGH A SECOND PURIFICATION ZONE, PASSING MELT FROM THE MELTING SECTION OF SAID FIRST PURIFICATION ZONE INTO THE REFLUX SECTION OF SAID PURIFICATION ZONE WHILE CRYSTALS ARE BEING MOVED THROUGH SAID FIRST PURIFICATION ZONE, AND PASSING MELT FROM THE MELTING SECTION OF SAID SECOND PURIFICATION ZONE INTO THE REFLUX SECTION OF SAID FIRST PURIFICATION ZONE WHILE CRYSTALS ARE BEING MOVED THROUGH SAID SECOND PURIFICATION ZONE.
Claim 2
Dependent Claim
153 words
IN A PROCESS WHEREIN CRYSTALS ARE PURIFIED, WHICH PROCESS COMPRISES, PASSING CRYSTALS THROUGH A FILTRATION SECTION AND A RELFUX SECTION INTO A MELTING SECTION OF A PURIFICATION ZONE, MELTING CRYSTALS IN SAID MELTING SECTION, WITHDRAWING A PORTION OF THE RESULTING MELT, AND PASSING ANOTHER PORTION OF SAID MELT INTO SAID REFLUX SECTION IN A DIRECTION COUNTERCURRENT TO THE MOVEMENT OF CRYSTALS THERETHROUGH, THE IMPROVEMENT WHICH OMPRISES, ALTERNATELY PASSING A FIRST STREAM OF SAID CRYSTALS THROUGH A FIRST PURIFICATION ZONE AND THEN PASSING A SECOND STREAM OF SAID CRYSTALS THROUGH A SECOND PURIFICATION ZONE, PASSING MELT FROM THE MELTING SECTION OF SAID FIRST PURIFICATION ZONE INTO THE REFLUX SECTION OF SAID PURIFICATION ZONE WHILE CRYSTALS ARE BEING MOVED THROUGH SAID FIRST PURIFICATION ZONE, AND PASSING MELT FROM THE MELTING SECTION OF SAID SECOND PURIFICATION ZONE INTO THE REFLUX SECTION OF SAID FIRST PURIFICATION ZONE WHILE CRYSTALS ARE BEING MOVED THROUGH SAID SECOND PURIFICATION ZONE.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |