US2842507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing improved asphalt
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-03-07
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Granted: 1958-07-08
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Expires: 1975-03-07
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Morris
- 👤 Joseph C Roediger
- 👤 Raymond G Newberg
- 👤 Andrew F Sayko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:57
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR THE PREPARATION OF AN IMPROVED ASPHALT WHICH COMPRISES INCORPORATING FROM ABOUT 0.1 TO ABOUT 4% BY WEIGHT OF A PHOSPHOROUS OXIDE AND ABOUT 0.5 TO ABOUT 20% BY WEIGHT OF A HIGH MOLECULAR WEIGHT COPOLYMER OF ISOBUTYLENE AND STYRENE INTO A PETROLEUM ASPHALT AND THEREAFTER AIR-BLOWING SAID ASPHALT.
Claim 2
Dependent Claim
51 words
A PROCESS FOR THE PREPARATION OF AN IMPROVED ASPHALT WHICH COMPRISES INCORPORATING FROM ABOUT 0.1 TO ABOUT 4% BY WEIGHT OF A PHOSPHOROUS OXIDE AND ABOUT 0.5 TO ABOUT 20% BY WEIGHT OF A HIGH MOLECULAR WEIGHT COPOLYMER OF ISOBUTYLENE AND STYRENE INTO A PETROLEUM ASPHALT AND THEREAFTER AIR-BLOWING SAID ASPHALT.
References Cited (Backward Citations)
US2714568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |