US2889337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isolation of furocoumarins
Assignee: Individual
•
Filing: 1956-07-19
•
Granted: 1959-06-02
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Expires: 1976-07-19
Abstract
No abstract record available.
Inventors
- 👤 William L Stanley
- 👤 Sadie H Vannier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:52
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR ISOLATING, COUMARINS AND FUROCOUMARINS FROM A CITRUS OIL WHICH COMPRISES ADSORBING THE CITRUS OIL ON A SOLID ADSORBENT MATERIAL, ELUTING THE ADSORBENT MATERIAL WITH A LIQUID COMPRISING AN OXYGENATED ORGNAIC SOLVENT, COLLECTING THE RESUDLTING IN A SERIES OF FRACTIONS CONTAINING INDIVIDUAL COUMARINS AND FUROCOUMARINS, AND INDIVIDUALLY RECOVERING THE COUMARINS AND FUROCOUMARINS FROM THE FRACTIONS.
Claim 2
Dependent Claim
57 words
A PROCESS FOR ISOLATING, COUMARINS AND FUROCOUMARINS FROM A CITRUS OIL WHICH COMPRISES ADSORBING THE CITRUS OIL ON A SOLID ADSORBENT MATERIAL, ELUTING THE ADSORBENT MATERIAL WITH A LIQUID COMPRISING AN OXYGENATED ORGNAIC SOLVENT, COLLECTING THE RESUDLTING IN A SERIES OF FRACTIONS CONTAINING INDIVIDUAL COUMARINS AND FUROCOUMARINS, AND INDIVIDUALLY RECOVERING THE COUMARINS AND FUROCOUMARINS FROM THE FRACTIONS.
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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |