Patent US570246A successfully refreshed from Google Patents.
Patent US2801192A successfully refreshed from Google Patents.
US2801192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification process for removing soluble impurities from fusible solid substances
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1954-04-15
•
Granted: 1957-07-30
•
Expires: 1974-04-15
Abstract
No abstract record available.
Inventors
- 👤 Overby Sune Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
C; C30; C30B; C30B13/00; C22; C22B; C22B9/00; C22B9/02; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF REMOVING SOLUBLE IMPURITIES HAVING A DISTRIBUTION COEFFICIENT K OF MORE THAN I.0 FROM A SOLID SUBSTANCE FUSIBLE BY HEAT, COMPRISING THE STEPS OF HEATING THE SUBSTANCE INCLUDING THE IMPURITIES IN AN ELONGATED MOLD TO MELTING TEMPERATURE, SUBJECTING PART OF THE MELT TO A TRANSVERSLY DIRECTED LOCALIZED COOLING ZONE WHILE MAINTAINING THE REMAINING PART OF THE MELT AT A TEMPERATURE AT WHICH IT IS IN THE LIQUID PHASE TO FORM A SOLID CORE BORDERED BY LIQUID SUBSTANCE INCLUDING IMPURITIES, DISPLACING THE LOCALIZED COOLING ZONE ALONG THE MOLD FOR SEQUENTIALLY SOLIDIFYING AND REMELTING PARTS OF THE SUBSTANCE INCLUDING IMPURITIES THEREBY CAUSING A SOLID CORE TO MOVE IN UNISON WITH THE DISPLACEMENT OF SAID COOLING ZONE
Claim 2
Independent Claim
116 words
A METHOD OF REMOVING SOLUBLE IMPURITIES HAVING A DISTRIBUTION COEFFICIENT K OF MORE THAN I.0 FROM A SOLID SUBSTANCE FUSIBLE BY HEAT, COMPRISING THE STEPS OF HEATING THE SUBSTANCE INCLUDING THE IMPURITIES IN AN ELONGATED MOLD TO MELTING TEMPERATURE, SUBJECTING PART OF THE MELT TO A TRANSVERSLY DIRECTED LOCALIZED COOLING ZONE WHILE MAINTAINING THE REMAINING PART OF THE MELT AT A TEMPERATURE AT WHICH IT IS IN THE LIQUID PHASE TO FORM A SOLID CORE BORDERED BY LIQUID SUBSTANCE INCLUDING IMPURITIES, DISPLACING THE LOCALIZED COOLING ZONE ALONG THE MOLD FOR SEQUENTIALLY SOLIDIFYING AND REMELTING PARTS OF THE SUBSTANCE INCLUDING IMPURITIES THEREBY CAUSING A SOLID CORE TO MOVE IN UNISON WITH THE DISPLACEMENT OF SAID COOLING ZONE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |