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Patent US2503175A successfully refreshed from Google Patents.
US2503175A
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Method of refining trinidad asphalt
Assignee: Barber Oil Corp
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Filing: 1946-06-28
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Granted: 1950-04-04
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Expires: 1966-06-28
Abstract
No abstract record available.
Inventors
- 👤 Preston R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:54
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
A REFINED TRINIDAD LAKE ASPHALT CONTAINING IN SUSPENSION A PORTION OF THE MINERAL MATTER NATURALLY CONTAINED IN CRUDE TRINIDAD LAKE ASPHALT, THE MINERAL MATTER BEING AN AMOUNT NOT IN EXCESS OF ABOUT 30% BY WEIGHT OF THE REFINED ASPHALT AND OF A PARTICLE SIZE NOT LARGER THAN ABOUT 10 MICRONS AND INCLUDING SUBSTANTIALLY ALL OF THE CLAY CONTENT NATURALLY CONTAINED IN CRUDE TRINIDAD LAKE ASPHALT.
Claim 2
Dependent Claim
65 words
A REFINED TRINIDAD LAKE ASPHALT CONTAINING IN SUSPENSION A PORTION OF THE MINERAL MATTER NATURALLY CONTAINED IN CRUDE TRINIDAD LAKE ASPHALT, THE MINERAL MATTER BEING AN AMOUNT NOT IN EXCESS OF ABOUT 30% BY WEIGHT OF THE REFINED ASPHALT AND OF A PARTICLE SIZE NOT LARGER THAN ABOUT 10 MICRONS AND INCLUDING SUBSTANTIALLY ALL OF THE CLAY CONTENT NATURALLY CONTAINED IN CRUDE TRINIDAD LAKE ASPHALT.
Claim 3
Independent Claim
106 words
A METHOD FOR REFINING TRINIDAD ASPHALT MIXED WITH MINERAL MATTER INCLUDING THE CLAY NATURALLY CONTAINED IN CRUDE TRINIDAD ASPHALT, WHICH INCLUDES THE STEPS OF FORMING A MIXTURE OF A SOLUTION OF SAID ASPHALT IN A SOLVENT WITH WATER, THE AMOUNT OF SOLVENT IN THE MIXTURE BEING IN EXCESS OF THE AMOUNT OF WATER AND THE SOLVENT PHASE OF SAID MIXTURE HAVING A SPECIFIC GRAVITY DIFFERENT FROM THAT OF THE AQUEOUS COMPONENT OF THE MIXTURE, AND EFFECTING A GRAVITY SEPARATION OF MINERAL MATTER OF A SIZE ABOVE ABOUT 10 MICRONS AND WATER FROM SOLVENT AND ASPHALT DISSOLVED THEREIN WITHOUT SUBSTANTIALLY REDUCING THE CLAY CONTENT OF THE ASPHALT.
Claim 4
Independent Claim
106 words
A METHOD FOR REFINING TRINIDAD ASPHALT MIXED WITH MINERAL MATTER INCLUDING THE CLAY NATURALLY CONTAINED IN CRUDE TRINIDAD ASPHALT, WHICH INCLUDES THE STEPS OF FORMING A MIXTURE OF A SOLUTION OF SAID ASPHALT IN A SOLVENT WITH WATER, THE AMOUNT OF SOLVENT IN THE MIXTURE BEING IN EXCESS OF THE AMOUNT OF WATER AND THE SOLVENT PHASE OF SAID MIXTURE HAVING A SPECIFIC GRAVITY DIFFERENT FROM THAT OF THE AQUEOUS COMPONENT OF THE MIXTURE, AND EFFECTING A GRAVITY SEPARATION OF MINERAL MATTER OF A SIZE ABOVE ABOUT 10 MICRONS AND WATER FROM SOLVENT AND ASPHALT DISSOLVED THEREIN WITHOUT SUBSTANTIALLY REDUCING THE CLAY CONTENT OF THE ASPHALT.
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) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |