US3235482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing finely-divided asphaltic material
Assignee: Texaco Inc
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Filing: 1962-03-26
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Granted: 1966-02-15
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Knowles
- 👤 Frederic C Mccoy
- 👤 Harry V Rees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:28
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD FOR PREPARING POWDERED ASPHALT CONSISTING ESSENTIALLY OF DISSOLVING ASPHALTIC MATERIAL IN AN INORGANIC LIQUID SOLVENT SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURAN, PYRIDINE AND DIOXANE IN AN AMOUNT SUFFICIENT TO FORM A RESULTANT SOLUTION CONTAINING BETWEEN 5 TO 50 WT. PERCENT ASPHALT, CONTACTING THE RESULTANT SOLUTION WITH A VOLUMETRIC EXCESS OF DISSOCIATING LIQUID UNDER AGITATION SUFFICIENT TO CAUSE THE RESULTANT LIQUID PHASE VIOLENT AND IRREGULAR MOTION, SAID DISSOCIATING LIQUID MAINTAINED AT A TEMPERATURE AT LEAST ABOUT 100*F. BELOW THAT OF THE SOFTENING POINT OF SAID ASPHALTIC MATERIAL WHEREBY SAID ASPHALTIC MATERIAL SEPARATES FROM THE RESULTING MIXTURE AS AN ASPHALT POWDER, AND RECOVERING SAID ASPHALT POWDER, SAID DISSOCIATING LIQUID SELECTED FROM THE GROUP CONSISTING OF WATER, AQUEOUS ALKANOL OF 1 TO 4 CARBONS AND AQUEOUS ALKANONE OF 1 TO 4 CARBONS.
Claim 2
Independent Claim
132 words
A METHOD FOR PREPARING POWDERED ASPHALT CONSISTING ESSENTIALLY OF DISSOLVING ASPHALTIC MATERIAL IN AN INORGANIC LIQUID SOLVENT SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURAN, PYRIDINE AND DIOXANE IN AN AMOUNT SUFFICIENT TO FORM A RESULTANT SOLUTION CONTAINING BETWEEN 5 TO 50 WT. PERCENT ASPHALT, CONTACTING THE RESULTANT SOLUTION WITH A VOLUMETRIC EXCESS OF DISSOCIATING LIQUID UNDER AGITATION SUFFICIENT TO CAUSE THE RESULTANT LIQUID PHASE VIOLENT AND IRREGULAR MOTION, SAID DISSOCIATING LIQUID MAINTAINED AT A TEMPERATURE AT LEAST ABOUT 100*F. BELOW THAT OF THE SOFTENING POINT OF SAID ASPHALTIC MATERIAL WHEREBY SAID ASPHALTIC MATERIAL SEPARATES FROM THE RESULTING MIXTURE AS AN ASPHALT POWDER, AND RECOVERING SAID ASPHALT POWDER, SAID DISSOCIATING LIQUID SELECTED FROM THE GROUP CONSISTING OF WATER, AQUEOUS ALKANOL OF 1 TO 4 CARBONS AND AQUEOUS ALKANONE OF 1 TO 4 CARBONS.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |