Patent US4271176A successfully refreshed from Google Patents.
US4271176A
Expired / Lapsed
US
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N-(Hydroxymethyl)-N-(1,3-dihydroxymethyl-2,5-dioxo-4-imidazolidinyl)-N'-(hydroxymethyl)urea used as a preservative agent
Assignee: Sutton Laboratory Inc
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Filing: 1979-08-28
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Granted: 1981-06-02
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Expires: 1999-08-28
Abstract
Abstract N-(hydroxymethyl)-N-(1,3-dihydroxymethyl-2,5-dioxo-4-imidazolidinyl)-N'-(hydroxymethyl)urea prepared by the reaction of allantoin with formaldehyde is disclosed. The compound exhibits activity against bacteria, mold and yeast and hence is useful as a preservative for products susceptible to microbial contamination.
Inventors
- 👤 Philip A. Berke
- 👤 William E. Rosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:01
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/005; A01; A01N; A01N47/00; A01N47/08; A01N47/28; A01N47/36; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/494; A61K8/4946; C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/88; A61K2800/00; A61K2800/40; A61K2800/52; A61K2800/524
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A method of protecting a product susceptible to microbial contamination by yeast and/or mold, comprising incorporating in said product an effective amount of a condensation product of formaldehyde and allantoin in the proportion of four moles of formaldehyde to one mole of allantoin, having the structural formula: ##STR2##
Claim 2
Independent Claim
48 words
A method of protecting a product susceptible to microbial contamination by yeast and/or mold, comprising incorporating in said product an effective amount of a condensation product of formaldehyde and allantoin in the proportion of four moles of formaldehyde to one mole of allantoin, having the structural formula: ##STR2##
Claim 3
Independent Claim
49 words
A method of protecting a product susceptible to microbial contamination by bacteria, yeast and mold, comprising incorporating in said product an effective amount of a condensation product of formaldehyde and allantoin in the proportion of four moles of formaldehyde to one mole of allantoin, having the structural formula: ##STR3##
Claim 4
Independent Claim
49 words
A method of protecting a product susceptible to microbial contamination by bacteria, yeast and mold, comprising incorporating in said product an effective amount of a condensation product of formaldehyde and allantoin in the proportion of four moles of formaldehyde to one mole of allantoin, having the structural formula: ##STR3##
References Cited (Backward Citations)
US3248285A
Cited
FR2362131A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |