Patent US3280502A successfully refreshed from Google Patents.
US3280502A
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Process for the preparation of lutein
Assignee: F Hoffmann La Roche AG
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Filing: 1962-11-07
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Granted: 1966-10-25
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Expires: 1982-11-07
Abstract
No abstract record available.
Inventors
- 👤 Farrow Wendall Moore
- 👤 Tabenkin Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:42
CPC Classifications
C; C12; C12P; C12P23/00; A; A23; A23K; A23K20/00; A23K20/10; A23K20/179; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/46; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/946
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A PROCESS FOR THE PRODUCTION OF LUTEIN COMPRISING THE STEPS OF CULTURING IN THE ABSENCE OF ILLUMINATIONS A THERMOPHILIC STRAIN OF CHLORELLA PYRENOIDOSA WHICH GROWS AT 38*C. IN AN AQUEOUS MEDIUM COMPRISING A CARBOHYDRATE SOURCE, FROM ABOUT 5 TO ABOUT 40 MG./LITER OF VITAMIN BI, GUANIDINE OR A SALT THEREOF THE MAGNESIUM IONS, THE PHOSPHATE ION, AND THE POTASSIUM ION, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 20 TO ABOUT 42*C. AND RECOVERING DRY CELLS FROM THE CULTURE MEDIUM.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE PRODUCTION OF LUTEIN COMPRISING THE STEPS OF CULTURING IN THE ABSENCE OF ILLUMINATIONS A THERMOPHILIC STRAIN OF CHLORELLA PYRENOIDOSA WHICH GROWS AT 38*C. IN AN AQUEOUS MEDIUM COMPRISING A CARBOHYDRATE SOURCE, FROM ABOUT 5 TO ABOUT 40 MG./LITER OF VITAMIN BI, GUANIDINE OR A SALT THEREOF THE MAGNESIUM IONS, THE PHOSPHATE ION, AND THE POTASSIUM ION, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 20 TO ABOUT 42*C. AND RECOVERING DRY CELLS FROM THE CULTURE MEDIUM.
Claim 3
Dependent Claim
90 words
AN AQUEOUS NUTRIENT MEDIUM FOR THE CULTURING IN THE ABSENCE OF ILLUMINATION OF A THERMOPHILIC STRAIN OF CHLORELLA PYRENOIDOSA WHICH GROWS AT 38*C. COMPRISING WATER, FROM 1 TO ABOUT 19 PERCENT BY WEIGHT OF A CARBOHYDRATE; FROM ABOUT 5 TO ABOUT 40 MG./LITER OF VITAMIN B1; FROM ABOUT 0.05 TO ABOUT 0.7 PERCENT OF GUANIDINE OR A SALT THEREOF; FROM ABOUT 0.02 TO ABOUT 0.8 G./LITER OF MAGNESIUM ION, FROM ABOUT 0.06 TO ABOUT 3 G./LITER OF POTASSIUM ION, AND FROM ABOUT 0.06 TO ABOUT 2.5 G./LITER OF PHOSPHATE ION.
Claim 4
Dependent Claim
90 words
AN AQUEOUS NUTRIENT MEDIUM FOR THE CULTURING IN THE ABSENCE OF ILLUMINATION OF A THERMOPHILIC STRAIN OF CHLORELLA PYRENOIDOSA WHICH GROWS AT 38*C. COMPRISING WATER, FROM 1 TO ABOUT 19 PERCENT BY WEIGHT OF A CARBOHYDRATE; FROM ABOUT 5 TO ABOUT 40 MG./LITER OF VITAMIN B1; FROM ABOUT 0.05 TO ABOUT 0.7 PERCENT OF GUANIDINE OR A SALT THEREOF; FROM ABOUT 0.02 TO ABOUT 0.8 G./LITER OF MAGNESIUM ION, FROM ABOUT 0.06 TO ABOUT 3 G./LITER OF POTASSIUM ION, AND FROM ABOUT 0.06 TO ABOUT 2.5 G./LITER OF PHOSPHATE ION.
References Cited (Backward Citations)
US2949700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |