US3067125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewaxing process
Assignee: California Research LLC
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Filing: 1959-09-30
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Granted: 1962-12-04
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Expires: 1979-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jacob D Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:22
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF CRYSTALLIZING WAX FROM A WAXY OIL WHICH COMPRISES DILUTING THE OIL AT A TEMPERATURE ABOVE THE WAX NUCLEATION TEMPERATURE WITH METHYLETHYLKETONE (MEK), TO FORM AN OIL-MEK SOLUTION, CHILLING THE SOLUTION SO OBTAINED TO A TEMPERATURE AT WHICH WAX SEPARATES AND CRYSTALLIZES BY ADMIXING THEREWITH A RECYCLE WATER STREAM PRECHILLED TO A LOWER TEMPERATURE, SEPARATION THE MIXTURE SO OBTAINED INTO AN OIL-MEK PHASE LADEN WITH WAX CRYSTALS AND AN AQUEOUS PHASE SATURATED WITH MEK, AND CONTINUOUSLY WITHDRAWING AND COOLING A PORTION OF THE AQUEOUS PHASE FOR ADMIXTURE AS THE AFORESAID PRECHILLED RECYCLE STREAM WITH ADDITIONAL OIL-MEK SOLUTION.
Claim 2
Independent Claim
99 words
THE METHOD OF CRYSTALLIZING WAX FROM A WAXY OIL WHICH COMPRISES DILUTING THE OIL AT A TEMPERATURE ABOVE THE WAX NUCLEATION TEMPERATURE WITH METHYLETHYLKETONE (MEK), TO FORM AN OIL-MEK SOLUTION, CHILLING THE SOLUTION SO OBTAINED TO A TEMPERATURE AT WHICH WAX SEPARATES AND CRYSTALLIZES BY ADMIXING THEREWITH A RECYCLE WATER STREAM PRECHILLED TO A LOWER TEMPERATURE, SEPARATION THE MIXTURE SO OBTAINED INTO AN OIL-MEK PHASE LADEN WITH WAX CRYSTALS AND AN AQUEOUS PHASE SATURATED WITH MEK, AND CONTINUOUSLY WITHDRAWING AND COOLING A PORTION OF THE AQUEOUS PHASE FOR ADMIXTURE AS THE AFORESAID PRECHILLED RECYCLE STREAM WITH ADDITIONAL OIL-MEK SOLUTION.
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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |