US2421090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long chain aliphatic halides and method of preparing same
Assignee: University of Minnesota Twin Cities
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Filing: 1942-08-01
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Granted: 1947-05-27
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Expires: 1962-08-01
Abstract
No abstract record available.
Inventors
- 👤 Smith Lee Irvin
- 👤 Joseph A Sprung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:39
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72; C07C; C07C17/00; C07C17/093; C07C17/26; C07C17/263; C07C17/2632; C07C19/00; C07C19/01; C07C19/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2015706A
Cited
US2122812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |