Patent US2774724A successfully refreshed from Google Patents.
US2774724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-blown asphalt-resin composition and process of making same
Assignee: Sinclair Refining Co
•
Filing: 1953-04-07
•
Granted: 1956-12-18
•
Expires: 1973-04-07
Abstract
No abstract record available.
Inventors
- 👤 William B Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:48
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A MOLDING COMPOUND CONSISTING ESSENTIALLY OF AN AIR-BLOWN MIXTURE OF AN ASPHALT WHOSE AI BLOWING CHARACTERISTICS ARE SUCH THAT WHEN AIR-BLOWN TO ABOUT A 300* F. SOFTENING POINT AT AN ELEVATED TEMPERATURE ITS NEEDLE PENETRATION AT 77* F. WILL NOT BE MORE THAN ABOUT 5, AND A PARAFFINIC PETROLEUM RESIN FRACTION HAVING A SAYBOLT UNIVERSAL VISCOSITY AT 210* F. OF ABOUT 2500 TO 8000 SECONDS, SAID RESIN FRACTION BEING ABOUT 30 TO 70 WEIGHT PERCENT OF SAID MIXTURE.
Claim 2
Dependent Claim
78 words
A MOLDING COMPOUND CONSISTING ESSENTIALLY OF AN AIR-BLOWN MIXTURE OF AN ASPHALT WHOSE AI BLOWING CHARACTERISTICS ARE SUCH THAT WHEN AIR-BLOWN TO ABOUT A 300* F. SOFTENING POINT AT AN ELEVATED TEMPERATURE ITS NEEDLE PENETRATION AT 77* F. WILL NOT BE MORE THAN ABOUT 5, AND A PARAFFINIC PETROLEUM RESIN FRACTION HAVING A SAYBOLT UNIVERSAL VISCOSITY AT 210* F. OF ABOUT 2500 TO 8000 SECONDS, SAID RESIN FRACTION BEING ABOUT 30 TO 70 WEIGHT PERCENT OF SAID MIXTURE.
Claim 3
Independent Claim
98 words
A METHOD OF MANUFACTURING A MOLDING COMPOUND WHICH COMPRISES MIXING AN ASPHALT WHOSE AIR BLOWING CHARACTERISTICS ARE SUCH THAT WHEN AIR-BLOWN TO ABOUT A 300* F. SOFTENING POINT AT AN ELEVATED TEMPERATURE ITS NEEDLE PENETRATION AT 77* F. WILL NOT BE MORE THAN ABOUT 5, AND A PARAFFINIC PETROLEUM RESIN FRACTION HAVING A SAYBOLT UNIVERSAL VISCOSITY AT 210* F. OF ABOUT 2500 TO 8000 SECONDS TO OBTAIN A MIXTURE IN WHICH SAID RESIN FRACTION IS ABOUT 30 TO 70 WEIGHT PERCENT OF SAID MIXTURE, AND INTRODUCING AIR INTO SAID MIXTURE WHILE MAINTAINING THE MIXTURE AT AN ELEVATED TEMPERATURE.
Claim 4
Independent Claim
98 words
A METHOD OF MANUFACTURING A MOLDING COMPOUND WHICH COMPRISES MIXING AN ASPHALT WHOSE AIR BLOWING CHARACTERISTICS ARE SUCH THAT WHEN AIR-BLOWN TO ABOUT A 300* F. SOFTENING POINT AT AN ELEVATED TEMPERATURE ITS NEEDLE PENETRATION AT 77* F. WILL NOT BE MORE THAN ABOUT 5, AND A PARAFFINIC PETROLEUM RESIN FRACTION HAVING A SAYBOLT UNIVERSAL VISCOSITY AT 210* F. OF ABOUT 2500 TO 8000 SECONDS TO OBTAIN A MIXTURE IN WHICH SAID RESIN FRACTION IS ABOUT 30 TO 70 WEIGHT PERCENT OF SAID MIXTURE, AND INTRODUCING AIR INTO SAID MIXTURE WHILE MAINTAINING THE MIXTURE AT AN ELEVATED TEMPERATURE.
References Cited (Backward Citations)
US1751848A
Cited
US2143872A
Cited
US2308245A
Cited
US2635054A
Cited
US2627498A
Cited
US2649384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |