US2519863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of beta-, gamma-, and delta-tocopherol to alpha-tocopherol by aminoalkylation and reduction
Assignee: Eastman Kodak Co
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Filing: 1949-05-14
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Granted: 1950-08-22
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Expires: 1969-05-14
Abstract
No abstract record available.
Inventors
- 👤 Weisler Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:27
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
AS A NEW CHEMICAL COMPOUND, A SUBSTITUTED TOCOPHEROL SELECTED FROM THE CLASS CONSISTING OF BETA-TOCOPHEROL, GAMMA-TOCOPHEROL AND DELTATOCOPHEROL HAVING AT LEAST ONE NUCLEAR SUBSTITUENT GROUP IN THE POSITION NORMALLY OCCUPIED BY AN AROMATIC HYDROGEN ATOM, SAID SUBSTITUTE GROUP HAVING THE FORMULA XR- WHEREIN R IS A HYDROCARBON RADICAL AND X IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF AMINO GROUPS AND HYDROCARBON-SUBSTITUTED AMINO GROUPS.
Claim 2
Dependent Claim
65 words
AS A NEW CHEMICAL COMPOUND, A SUBSTITUTED TOCOPHEROL SELECTED FROM THE CLASS CONSISTING OF BETA-TOCOPHEROL, GAMMA-TOCOPHEROL AND DELTATOCOPHEROL HAVING AT LEAST ONE NUCLEAR SUBSTITUENT GROUP IN THE POSITION NORMALLY OCCUPIED BY AN AROMATIC HYDROGEN ATOM, SAID SUBSTITUTE GROUP HAVING THE FORMULA XR- WHEREIN R IS A HYDROCARBON RADICAL AND X IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF AMINO GROUPS AND HYDROCARBON-SUBSTITUTED AMINO GROUPS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |