Patent US2450756A successfully refreshed from Google Patents.
US2450756A
Expired / Lapsed
US
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Air-blown asphalt and catalytic preparation thereof
Assignee: Lion Oil Co
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Filing: 1945-04-30
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Granted: 1948-10-05
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Expires: 1965-04-30
Abstract
No abstract record available.
Inventors
- 👤 Hoiberg Arnold John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:23
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA319986A
Cited
US1487020A
Cited
US2179208A
Cited
US2121437A
Cited
US2281728A
Cited
US2340640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |