Patent US2431891A successfully refreshed from Google Patents.
US2431891A
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Asphalt emulsions for treatment of coal and method of preparing the same
Assignee: JOE F KLANER JR
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Filing: 1944-03-21
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Granted: 1947-12-02
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Expires: 1964-03-21
Abstract
No abstract record available.
Inventors
- 👤 Charles R Rosencranse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:05
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/10; C08; C08L; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2314242A
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US2350548A
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US2340449A
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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) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |