Patent US2501149A successfully refreshed from Google Patents.
US2501149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of treating bituminous materials
Assignee: AT&T Inc
•
Filing: 1946-03-26
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Granted: 1950-03-21
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Expires: 1966-03-26
Abstract
No abstract record available.
Inventors
- 👤 Kinloch N Yellott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:10
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF MAKING BITUMINOUS COMPOSTIONS, WHICH COMPRISES HEATING A MASS OF GILSONITE TO A TEMPERATURE OF ABOUT 625*F., ALLOWING THE MASS TO COOL TO A TEMPERATURE OF ABOUT 580*F., INCORPORATING IN THE MOLTEN MATERIAL A PREDETERMINED QUANTITY OF MICROCRYSTALLINE WAXES, ALLOWING THE RESULTING MIXTURE TO COOL TO A TEMPERATURE OF ABOUT 475*F., AND THEN INCORPORATING IN THE RESULTING MIXTURE, A PREDETERMINED QUANTITY OF PARAFFIN.
Claim 2
Independent Claim
65 words
THE METHOD OF MAKING BITUMINOUS COMPOSTIONS, WHICH COMPRISES HEATING A MASS OF GILSONITE TO A TEMPERATURE OF ABOUT 625*F., ALLOWING THE MASS TO COOL TO A TEMPERATURE OF ABOUT 580*F., INCORPORATING IN THE MOLTEN MATERIAL A PREDETERMINED QUANTITY OF MICROCRYSTALLINE WAXES, ALLOWING THE RESULTING MIXTURE TO COOL TO A TEMPERATURE OF ABOUT 475*F., AND THEN INCORPORATING IN THE RESULTING MIXTURE, A PREDETERMINED QUANTITY OF PARAFFIN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |