Patent US3689641A successfully refreshed from Google Patents.
US3689641A
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Concentrated water suspension of nutrients
Assignee: Merck and Co Inc
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Filing: 1970-08-20
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Granted: 1972-09-05
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Expires: 1990-08-20
Abstract
Abstract A concentrated aqueous solution for the enrichment of foodstuffs containing a water soluble ferrous salt,thiamine, niacinamide, riboflavin that has been treated so as to remain in suspension, and as an anti-oxidant a combination of L-cysteine hydrochloride and ascorbic or erythrobic acid. The riboflavin suspension is produced by adding concentrated hydrochloric acid to the riboflavin and then adding the mixture to the aqueous solution containing the other nutrients and a suspending agent which is either methylcellulose, gum tragacanth or sodium carboxymethylcellulose.
Inventors
- 👤 Herbert D Spangler
- 👤 William G Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:59
CPC Classifications
A; A21; A21D; A21D2/00; A21D2/08; A21D2/28; A23; A23L; A23L33/00; A23L33/10; A23L33/17; A23L33/175; A23V; A23V2002/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
The concentrate of claim 1 in which the L-cysteine hydrochloride and the selected acid add up to 5 grams.
Claim 2
Dependent Claim
23 words
The concentrate of claim 1 in which the riboflavin-HCl premix is a mixture of 0.094 g. of riboflavin and 1.5 ml. concentrate HCl.
Claim 3
Dependent Claim
14 words
The concentrate of claim 1 in which thiamine hydrochloride or thiamine mononitrate is used.
Claim 4
Dependent Claim
10 words
The concentrate of claim 1 in which niacin is used.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |