US2921313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of rubberized bitumen
Assignee: Individual
•
Filing: 1955-09-21
•
Granted: 1960-01-12
•
Expires: 1975-09-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis B Odasz
- 👤 Robert V Witter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:26
CPC Classifications
C; C08; C08L; C08L95/00; Y; Y10; Y10S; Y10S528/00; Y10S528/931; Y10S528/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN THE PROCESS OF MANUFACTURING RUBBERIZED ASPHALT IN WHICH AN AQUEOUS RUBBER LATEX IS INTRODUCED INTO A CONFINED BODY OF MOLTEN ASPHALT MOVING THROUGH AN ENCLOSED ZONE, THE LATEX BEING INTRODUCED AT A POINT WITHIN THE MOLTEN BODY WHERE THE HEAT CONTENT OF THE ASPHALT IS SUFFICIENTLY GREAT TO EVAPORATE THE WATER CONTENT OF THE LATEX, THE FLOW OF THE RESULTANT MIXTURE IS CONTINUED AS A CONFINED BODY FOR A TIME PERIOD SUFFICIENT TO OBTAIN UNIFORM DISPERSION OF THE RUBBER IN THE ASPHALT AND THE VAPORIZATION OF THE WATER FROM THE LATEX TO FORM STEAM AND THE MIXTURE IS THEN DISCHARGED FROM THE ENCLOSED ZONE FOR RELEASE OF THE STEAM, AND IN WHICH PROCESS AN OBJECTIONABLE AMOUNT OF FOAM AND FORTH NORMALLY RESULTS UPON DISCHARGE OF THE MIXTURE FROM SAID ENCLOSED ZONE, THE IMPROVEMENT WHEREBY SUBSTANTIALLY FOAM-FREE DISPERSIONS HAVING SUPERIOR PROPERTIES ARE PRODUCED WHICH
Claim 2
Dependent Claim
144 words
IN THE PROCESS OF MANUFACTURING RUBBERIZED ASPHALT IN WHICH AN AQUEOUS RUBBER LATEX IS INTRODUCED INTO A CONFINED BODY OF MOLTEN ASPHALT MOVING THROUGH AN ENCLOSED ZONE, THE LATEX BEING INTRODUCED AT A POINT WITHIN THE MOLTEN BODY WHERE THE HEAT CONTENT OF THE ASPHALT IS SUFFICIENTLY GREAT TO EVAPORATE THE WATER CONTENT OF THE LATEX, THE FLOW OF THE RESULTANT MIXTURE IS CONTINUED AS A CONFINED BODY FOR A TIME PERIOD SUFFICIENT TO OBTAIN UNIFORM DISPERSION OF THE RUBBER IN THE ASPHALT AND THE VAPORIZATION OF THE WATER FROM THE LATEX TO FORM STEAM AND THE MIXTURE IS THEN DISCHARGED FROM THE ENCLOSED ZONE FOR RELEASE OF THE STEAM, AND IN WHICH PROCESS AN OBJECTIONABLE AMOUNT OF FOAM AND FORTH NORMALLY RESULTS UPON DISCHARGE OF THE MIXTURE FROM SAID ENCLOSED ZONE, THE IMPROVEMENT WHEREBY SUBSTANTIALLY FOAM-FREE DISPERSIONS HAVING SUPERIOR PROPERTIES ARE PRODUCED WHICH
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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |