US2568946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of paraffin waxes
Assignee: Gulf Research and Development Co
•
Filing: 1948-03-10
•
Granted: 1951-09-25
•
Expires: 1968-03-10
Abstract
No abstract record available.
Inventors
- 👤 Burk Herbert Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:07
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE PROCESS FOR THE MANUFACTURE OF PARAFFIN WAX FROM A SLACK WAX CONSISTING OF CRYSTALLINE WAXES AND FROM ABOUT 25 TO ABOUT 60 PER CENT BY WEIGHT OF OIL, WHICH COMPRISES PREPARING A MIXTURE CONSISTING OF SAID SLACK WAX AND BETWEEN ABOUT 5 AND ABOUT 25 PER CENT BY WEIGHT OF WOOD SAWDUST, CENTRIFUGING SAID MIXTURE AT A TEMPERATURE BETWEEN ABOUT 20* C. AND ABOUT 25* C. TO SEPARATE THEREFROM THE NORMALLY LIQUID OIL CONTENT OF THE SLACK WAX, SUBJECTING THE RESIDUE TO A SECOND CENTRIFUGING OPERATION AT A TEMPERATURE BETWEEN ABOUT 35* C. AND ABOUT 25* C. TO SEPARATE THEREFROM LOW-MELTING WAX COMPONENTS, SUBJECTING THE RESIDUE FROM SAID SECOND CENTRIFUGING OPERATION TO A THIRD CENTRIFUGING OPERATION AT A TEMPERATURE BETWEEN ABOUT 45* C. AND ABOUT 55* C. TO SEPARATE THEREFROM INTERMEDIATEMELTING WAX COMPONENTS, AND SEPARATING THE WOOD SAWDUST FROM THE WAX RESIDUE FROM SAID THIRD CENTRIFUGING OPERATION.
Claim 2
Dependent Claim
148 words
THE PROCESS FOR THE MANUFACTURE OF PARAFFIN WAX FROM A SLACK WAX CONSISTING OF CRYSTALLINE WAXES AND FROM ABOUT 25 TO ABOUT 60 PER CENT BY WEIGHT OF OIL, WHICH COMPRISES PREPARING A MIXTURE CONSISTING OF SAID SLACK WAX AND BETWEEN ABOUT 5 AND ABOUT 25 PER CENT BY WEIGHT OF WOOD SAWDUST, CENTRIFUGING SAID MIXTURE AT A TEMPERATURE BETWEEN ABOUT 20* C. AND ABOUT 25* C. TO SEPARATE THEREFROM THE NORMALLY LIQUID OIL CONTENT OF THE SLACK WAX, SUBJECTING THE RESIDUE TO A SECOND CENTRIFUGING OPERATION AT A TEMPERATURE BETWEEN ABOUT 35* C. AND ABOUT 25* C. TO SEPARATE THEREFROM LOW-MELTING WAX COMPONENTS, SUBJECTING THE RESIDUE FROM SAID SECOND CENTRIFUGING OPERATION TO A THIRD CENTRIFUGING OPERATION AT A TEMPERATURE BETWEEN ABOUT 45* C. AND ABOUT 55* C. TO SEPARATE THEREFROM INTERMEDIATEMELTING WAX COMPONENTS, AND SEPARATING THE WOOD SAWDUST FROM THE WAX RESIDUE FROM SAID THIRD CENTRIFUGING OPERATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |