Patent US2867639A successfully refreshed from Google Patents.
US2867639A
Expired / Lapsed
US
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Process for stabilizing and refining tung oil and product thereof
Assignee: Tungolin Co Inc
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Filing: 1954-08-13
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Granted: 1959-01-06
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Expires: 1974-08-13
Abstract
No abstract record available.
Inventors
- 👤 Watts John Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:43
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/001; C11B5/00; C11B5/0085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
A PROCESS FOR STABILIZING AND REFINING TUNG OIL WHICH COMPRISES TREATING TUNG OIL AT A TEMPERATURE OF ABOUT 170-190*F. WITH AT LEAST ABOUT 5% OF A SOLID ADSORBENT FOR AT LEAST ABOUT 15 MINUTES TO EFFECT DECOLORIZATION AND DEODORIZATION WITHOUT SUBSTANTIALLY INCREASING THE VISCOSITY OF SAID OIL; REMOVING THE SOLID ADSORBENT, HEATING A MINOR PROPORTION COMPRISING AT LEAST ABOUT 20% OF THE TUNG OIL AFTER SAID TREATMENT WITH SOLID ADSORDENT TO A TEMPERATURE OF ABOUT 475-500*F., SAID TEMPERATURE BEING MAINTAINED FOR UP TO ABOUT 15 MINUTES, AND COMBINING SAID HIGH-TEMPERATURE TREATED PORTION WITH THE MAJOR PROPORTION OF THE ADSORBENT-TREATED OIL THE MAXIMUM TEMPERATURE TO WHICH SAID MAJOR PROPORTION OF TUNG OIL IS SUBJECTED BEING ABOUT 190*F.
Claim 2
Dependent Claim
116 words
A PROCESS FOR STABILIZING AND REFINING TUNG OIL WHICH COMPRISES TREATING TUNG OIL AT A TEMPERATURE OF ABOUT 170-190*F. WITH AT LEAST ABOUT 5% OF A SOLID ADSORBENT FOR AT LEAST ABOUT 15 MINUTES TO EFFECT DECOLORIZATION AND DEODORIZATION WITHOUT SUBSTANTIALLY INCREASING THE VISCOSITY OF SAID OIL; REMOVING THE SOLID ADSORBENT, HEATING A MINOR PROPORTION COMPRISING AT LEAST ABOUT 20% OF THE TUNG OIL AFTER SAID TREATMENT WITH SOLID ADSORDENT TO A TEMPERATURE OF ABOUT 475-500*F., SAID TEMPERATURE BEING MAINTAINED FOR UP TO ABOUT 15 MINUTES, AND COMBINING SAID HIGH-TEMPERATURE TREATED PORTION WITH THE MAJOR PROPORTION OF THE ADSORBENT-TREATED OIL THE MAXIMUM TEMPERATURE TO WHICH SAID MAJOR PROPORTION OF TUNG OIL IS SUBJECTED BEING ABOUT 190*F.
Claim 3
Dependent Claim
39 words
A STABLE, REFINED TUNG OIL HAVING A VISCOSITY OF ABOUT Q TO S ON THE GARDNER SCALE, AND CHARACTERIZED BY SUBSTANTIALLY LESS ODOR THAN THE UNTREATED OIL AND LIGHT COLOR, SAID OIL BEING SUBSTANTIALLY STABLE AGAINST FORMATION OF GLYCERYL-B-ELAEOSTEARATE.
Claim 4
Dependent Claim
39 words
A STABLE, REFINED TUNG OIL HAVING A VISCOSITY OF ABOUT Q TO S ON THE GARDNER SCALE, AND CHARACTERIZED BY SUBSTANTIALLY LESS ODOR THAN THE UNTREATED OIL AND LIGHT COLOR, SAID OIL BEING SUBSTANTIALLY STABLE AGAINST FORMATION OF GLYCERYL-B-ELAEOSTEARATE.
References Cited (Backward Citations)
US2380394A
Cited
US2418921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |