US3258467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction and purification of chlorophyll
Assignee: Individual
•
Filing: 1963-04-17
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Granted: 1966-06-28
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Expires: 1983-04-17
Abstract
No abstract record available.
Inventors
- 👤 Alexander F H Anderson
- 👤 Calvin Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:43
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/22; G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N33/00; G01N33/48; G01N2030/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN A METHOD OF OBTAINING PURE CHLOROPHYLL VALUES FROM AN UNREFINED EXTRACTANT OBTAINED BY SOLVENT EXTRACTION OF GREEN PLANTS, THE STEPS COMPRISING, ADSORBING THE EXTRACTANT ON POWDERED POLYOLEFIN, SAID POLYOLEFIN BEING SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND POLYPROPYLENE, CHROMATOGRAPHICALLY ELUTING XANTHOPHYLL FROM SAID POLYOLEFIN, FURTHER ELUTING SAID POLYOLEFIN TO COLLECT CHLOROPHYLL VALUES, READSORBING SAID CHLOROPHYLL VALUES ON SUCROSE, AND SEQUENTIALLY CHROMATOGRAPHICALLY ELUTING PURIFIED CHLOROPHYLL VALUES FROM SAID SURCOSE.
Claim 2
Dependent Claim
70 words
IN A METHOD OF OBTAINING PURE CHLOROPHYLL VALUES FROM AN UNREFINED EXTRACTANT OBTAINED BY SOLVENT EXTRACTION OF GREEN PLANTS, THE STEPS COMPRISING, ADSORBING THE EXTRACTANT ON POWDERED POLYOLEFIN, SAID POLYOLEFIN BEING SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND POLYPROPYLENE, CHROMATOGRAPHICALLY ELUTING XANTHOPHYLL FROM SAID POLYOLEFIN, FURTHER ELUTING SAID POLYOLEFIN TO COLLECT CHLOROPHYLL VALUES, READSORBING SAID CHLOROPHYLL VALUES ON SUCROSE, AND SEQUENTIALLY CHROMATOGRAPHICALLY ELUTING PURIFIED CHLOROPHYLL VALUES FROM SAID SURCOSE.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |