Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5707993 | Glycine anhydride dimethylol as a biocide and preservative | Philip A. Berke | 1998-01-13 |
| 5593681 | Glycine anhydride dimethylol as a biocide and preservative | Philip A. Berke | 1997-01-14 |
| 5244653 | Glycine anhydride dimethylol as a biocide and preservative | Philip A. Berke | 1993-09-14 |
| 5240015 | Wetted impact barrier for the reduction of tar and nicotine in cigarette smoke | David I. Rosen, Adam Rosen | 1993-08-31 |
| 5158099 | Wetted impact barrier for the reduction of tar and nicotine in cigarette smoke | David I. Rosen, Adam Rosen | 1992-10-27 |
| 4980176 | Preservative compositions and uses thereof | Philip A. Berke | 1990-12-25 |
| 4821745 | Apparatus and method for overcoming the habit of tobacco smoking | David I. Rosen | 1989-04-18 |
| RE32848 | Anti-microbial reaction product of #9 allantoin and formaldehyde | Philip A. Berke | 1989-01-31 |
| 4581351 | Composition of matter containing imidazolidinyl urea and pyrithione and its derivatives | Philip A. Berke | 1986-04-08 |
| 4525480 | Composition of matter containing cinnamaldehyde and parabens | Philip A. Berke | 1985-06-25 |
| 4487939 | N-(hydroxymethyl)-N-(1,3-dihydroxymethyl-2,5-dioxo-4-imidazolidinyl)-N'-( hydroxymethyl)urea | Philip A. Berke | 1984-12-11 |
| 4459303 | Antimicrobial preservative compounds | Philip A. Berke | 1984-07-10 |
| 4454133 | Antimicrobial compounds | Philip A. Berke | 1984-06-12 |
| 4337269 | Preservative compositions | Philip A. Berke | 1982-06-29 |
| 4271176 | N-(Hydroxymethyl)-N-(1 ,3-dihydroxymethyl-2,5-dioxo-4-imidazolidinyl)-N'-(hydroxymethyl)urea used as a preservative agent | Philip A. Berke | 1981-06-02 |