US3438865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of bacterial lipopolysaccharides
Assignee: TWYFORD LAB Ltd
•
Filing: 1966-08-30
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Granted: 1969-04-15
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Expires: 1986-08-30
Abstract
No abstract record available.
Inventors
- 👤 Elizabeth Work
- 👤 Kenneth William Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
C; C12; C12P; C12P21/00; C12P21/005; A; A61; A61K; A61K31/00; A61K31/70; A61K31/715; C12P7/00; C12P7/64; C12P7/6436; C12P7/6445; C12P7/6481; Y; Y02; Y02A; Y02A50/00; Y02A50/30; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/848; Y10S435/849
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PREPARATION OF A SOLUBLE COMPLEX OF PHOSPHOLIPID WITH PROTEIN LIPOPOLYSACCHARIDE WHICH PROCESS COMPRISES GROWING A LYSINE-REQUIRING MUTANT OF ESCHERICHIA COLI IN A SUB-OPTIMAL CONCENTRATION OF LYSINE, OBTAINING A CELL-FREE LIQUID FROM THE RESULTING CULTURE, PRECIPITATING A COMPLEX OF PHOSPHOLIPID WITH PROTEINLIPOPOLYSACCHARIDE FROM THE CELL-FREE LIQUID BY DISSOLVING A POLAR WATER-IMMISCIBLE ORGANIC COMPOUND IN THE CELLFREE LIQUID, SEPARATING THE PRECIPITATED MATERIAL AND REMOVING THE ORGANIC COMPOUND TO LEAVE A WATER-SOLUBLE COMPLEX OF PHOSPHOLIPID WITH PROTEIN-LIPOPOLYSACCHARIDE.
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE PREPARATION OF A SOLUBLE COMPLEX OF PHOSPHOLIPID WITH PROTEIN LIPOPOLYSACCHARIDE WHICH PROCESS COMPRISES GROWING A LYSINE-REQUIRING MUTANT OF ESCHERICHIA COLI IN A SUB-OPTIMAL CONCENTRATION OF LYSINE, OBTAINING A CELL-FREE LIQUID FROM THE RESULTING CULTURE, PRECIPITATING A COMPLEX OF PHOSPHOLIPID WITH PROTEINLIPOPOLYSACCHARIDE FROM THE CELL-FREE LIQUID BY DISSOLVING A POLAR WATER-IMMISCIBLE ORGANIC COMPOUND IN THE CELLFREE LIQUID, SEPARATING THE PRECIPITATED MATERIAL AND REMOVING THE ORGANIC COMPOUND TO LEAVE A WATER-SOLUBLE COMPLEX OF PHOSPHOLIPID WITH PROTEIN-LIPOPOLYSACCHARIDE.
References Cited (Backward Citations)
US3148120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |