Patent US2421608A successfully refreshed from Google Patents.
US2421608A
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Method of preparing amines
Assignee: Standard Oil Development Co
•
Filing: 1943-09-11
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Granted: 1947-06-03
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Expires: 1963-09-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Gohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:22
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1530392A
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US1662421A
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US1884362A
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US1878950A
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US1955873A
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US2039259A
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USRE22210E
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US2252927A
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US2252928A
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US2309034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |