US2658026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous materials and the method of preparing the same
Assignee: Standard Oil Co
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Filing: 1951-06-27
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Granted: 1953-11-03
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Expires: 1971-06-27
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Maclaren
- 👤 Mathew L Kalinowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:59
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
THE METHOD OF CONVERTING A POSITIVE SPOT TEST PETROLEUM BITUMEN MATERIAL TO A NAGATIVE SPOT TEST PRODUCT, COMPRISING ADMIXING WITH A PETROLEUM BUTUMEN MATERIAL NORMALLY HAVING A POSITIVE SPOT TEST, AND UNTREATED ASPHALTIC RESIN INSOLUBLE IN A LIQUEFIED NORMALLY GASEOUS HYDROCARBON OBTAINED FROM THE DEASPHALTING OF A PETROLEUM RESIDUUM NORMALLY EXHIBITING A NEGATIVE SPOT TEST WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON, SAID UNTREATED ASPHALTIC RESIN BEING PRESENT IN A SMALL BUT SUFFICIENT QUANTITY TO GIVE THE RESULTANT PRODUCT A NEGATIVE SPOT TEST.
Claim 2
Independent Claim
82 words
THE METHOD OF CONVERTING A POSITIVE SPOT TEST PETROLEUM BITUMEN MATERIAL TO A NAGATIVE SPOT TEST PRODUCT, COMPRISING ADMIXING WITH A PETROLEUM BUTUMEN MATERIAL NORMALLY HAVING A POSITIVE SPOT TEST, AND UNTREATED ASPHALTIC RESIN INSOLUBLE IN A LIQUEFIED NORMALLY GASEOUS HYDROCARBON OBTAINED FROM THE DEASPHALTING OF A PETROLEUM RESIDUUM NORMALLY EXHIBITING A NEGATIVE SPOT TEST WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON, SAID UNTREATED ASPHALTIC RESIN BEING PRESENT IN A SMALL BUT SUFFICIENT QUANTITY TO GIVE THE RESULTANT PRODUCT A NEGATIVE SPOT TEST.
Claim 3
Dependent Claim
78 words
A PETROLEUM ASPHALTIC COMPOSITION A MAJOR PROPORTION NEGATIVE SPOT TEST COMPRISING A MAJOR PROPORTION OF A PETROLEUM ASPHALTIC MATERIAL NORMALLY HAVING A POSITIVE SPOT TEST AND A MINOR PROPORTION OF UNTREATED ASPHALTIC RESINS INSOLUBLE IN LIQUEFIED NORMALLY GASEOUS HYDROCARBONS OBTAINED FROM THE DEASPHATING OF A BITUMEN RESIDUUM NORMALLY HAVING A NEGATIVE SPOT TEST WITH A LUQUFIED NORMALLY GASEOUS HYDROCARBON, SAID ASPHALTIC RESINS BEING PRESENT IN SMALL BUT SUFFICIENT QUANTITIES TO IMPACT TO SAID COMPOSITION A NEGATIVE SPOT TEST.
Claim 4
Dependent Claim
78 words
A PETROLEUM ASPHALTIC COMPOSITION A MAJOR PROPORTION NEGATIVE SPOT TEST COMPRISING A MAJOR PROPORTION OF A PETROLEUM ASPHALTIC MATERIAL NORMALLY HAVING A POSITIVE SPOT TEST AND A MINOR PROPORTION OF UNTREATED ASPHALTIC RESINS INSOLUBLE IN LIQUEFIED NORMALLY GASEOUS HYDROCARBONS OBTAINED FROM THE DEASPHATING OF A BITUMEN RESIDUUM NORMALLY HAVING A NEGATIVE SPOT TEST WITH A LUQUFIED NORMALLY GASEOUS HYDROCARBON, SAID ASPHALTIC RESINS BEING PRESENT IN SMALL BUT SUFFICIENT QUANTITIES TO IMPACT TO SAID COMPOSITION A NEGATIVE SPOT TEST.
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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |