US4123592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for incorporating flavorant into cellulosic substrates and products produced thereby
Assignee: Philip Morris USA Inc
•
Filing: 1976-04-07
•
Granted: 1978-10-31
•
Expires: 1996-04-07
Abstract
Abstract Stable cellulosic products containing releasable flavorant are described. These products are produced by impregnating a dry cellulosic substrate with an essentially anhydrous ammonia solution of a volatile flavorant and then subjecting the impregnated substrate to conditions of temperature and pressure sufficient to effect evaporation of essentially all of the impregnated solvent.
Inventors
- 👤 Norman B. Rainer
- 👤 Peter A. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:49
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/18; A24B15/28; A24B15/281; A24B15/282; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31989; Y10T428/31993
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
A method for producing stable, flavored cellulose products comprising impregnating a dry cellulosic substrate with an essentially anhydrous solution comprising liquid ammonia and a solute of volatile flavorant and then evaporating essentially all of the impregnated ammonia from said substrate such that from about 0.2% to 2.0% of the flavorant based on the dry weight of the cellulose is physically encapsulated within the cellulose structure and is not released therefrom until the cellulose is contacted with either heat or moisture.
Claim 2
Independent Claim
80 words
A method for producing stable, flavored cellulose products comprising impregnating a dry cellulosic substrate with an essentially anhydrous solution comprising liquid ammonia and a solute of volatile flavorant and then evaporating essentially all of the impregnated ammonia from said substrate such that from about 0.2% to 2.0% of the flavorant based on the dry weight of the cellulose is physically encapsulated within the cellulose structure and is not released therefrom until the cellulose is contacted with either heat or moisture.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein the solution contains from 1 to 30% by weight of flavorant.
Claim 4
Dependent Claim
26 words
The method of claim 2, wherein the solution additionally contains from about 1 to 30% by weight of a volatile polar liquid solvent for the flavorant.
Claim 5
Dependent Claim
17 words
The method of claim 1, wherein the substrate is impregnated at a temperature below about -33° C.
Claim 6
Dependent Claim
31 words
The method of claim 1, wherein evaporation of ammonia from the impregnated substrate is performed under conditions from -33° C. to +80° C. and from 1 to 760 mm. of Hg.
Claim 7
Dependent Claim
25 words
The method of claim 5, wherein the flavorant comprises an odor substance having a boiling point between about 100° and 260° C. at atmospheric pressure.
Claim 8
Dependent Claim
28 words
The method of claim 5, wherein the flavorant comprises an odor substance having a vapor pressure of between about 1 and 10 mm of Hg at 60° C.
Claim 9
Dependent Claim
9 words
The product produced by the process of claim 1.
Claim 10
Dependent Claim
10 words
The product of claim 8, wherein the substrate comprises paper.
Claim 11
Dependent Claim
13 words
The product of claim 8, wherein the substrate comprises particulate, partially pyrolyzed cellulose.
Claim 12
Dependent Claim
33 words
The product of claim 8, wherein the flavorant is selected from the group consisting of benzaldehyde, methyl salicylate, cinnamaldehyde, acetophenone, menthol, anisole, amyl acetate, eucalyptol, carvone, anethole, extract of fruit and admixtures thereof.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |