US2491495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of stabilizing carotene
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1948-11-08
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Granted: 1949-12-20
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Expires: 1968-11-08
Abstract
No abstract record available.
Inventors
- 👤 Edwin B Hart
- 👤 Andrew W Halverson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/59; A23; A23B; A23B7/00; A23B7/14; A23B7/144; A23B7/148; A23K; A23K30/00; A23K30/10; A23K30/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |