US3290891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Batch crystal purification
Assignee: Phillips Petroleum Co
•
Filing: 1963-05-02
•
Granted: 1966-12-13
•
Expires: 1983-05-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Merritt V De Lano
- 👤 Donald C Tabler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:18
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0009; B01D9/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A BATCH PROCESS FOR THE SEPARATION OF AT LEAST ONE COMPONENT FROM A LIQUID MIXTURE COMPRISING COOLING SAID LIQUID IN AN ELONGATE CONFINED BATCH COOLING ZONE TO FORM A BED OF CRYSTALS, MELTING SAID CRYSTALS TO FORM A MELT BY THE MOVEMENT OF A HEATED PISTON AGAINST ONE SURFACE OF SAID CRYSTAL BED, MAINTAINING INTIMATE CONTACT BETWEEN SAID PISTON AND THE MELT TRAPPED BETWEEN SAID PISTON AND SAID SURFACE, MOVING SAID PISTON TOWARD THE OPPOSITE END PORTION OF SAID CRYSTAL BED WITHOUT MOVING SAID BED AS SAID SURFACE MELTS, SAID PISTON FORCING A PORTION OF SAID MELT INTO THE SURRFACE AS REFLUX, REMOVING ADHERENT MOTHER
Claim 2
Dependent Claim
105 words
A BATCH PROCESS FOR THE SEPARATION OF AT LEAST ONE COMPONENT FROM A LIQUID MIXTURE COMPRISING COOLING SAID LIQUID IN AN ELONGATE CONFINED BATCH COOLING ZONE TO FORM A BED OF CRYSTALS, MELTING SAID CRYSTALS TO FORM A MELT BY THE MOVEMENT OF A HEATED PISTON AGAINST ONE SURFACE OF SAID CRYSTAL BED, MAINTAINING INTIMATE CONTACT BETWEEN SAID PISTON AND THE MELT TRAPPED BETWEEN SAID PISTON AND SAID SURFACE, MOVING SAID PISTON TOWARD THE OPPOSITE END PORTION OF SAID CRYSTAL BED WITHOUT MOVING SAID BED AS SAID SURFACE MELTS, SAID PISTON FORCING A PORTION OF SAID MELT INTO THE SURRFACE AS REFLUX, REMOVING ADHERENT MOTHER
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |