US4019521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smokable material and method for preparing same
Assignee: Philip Morris USA Inc
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Filing: 1975-03-27
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Granted: 1977-04-26
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Expires: 1995-03-27
Abstract
Abstract A smokable material formed by heating a cellulosic or carbohydrate material at a temperature within the range of 150°-750° C in an inert, non-oxidizing atmosphere for a time sufficient to effect a weight loss of at least 60% but not more than 90%.
Inventors
- 👤 Theodore S. Briskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:47
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/165
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
In the method of producing a smokable material, the steps of exposing a carbohydrate material selected from the group consisting of cellulose, cellulosic derivatives, starch, pectin, polyvinyl alcohol, gum and aliginates to a temperature of from about 350° to about 750° C for a time sufficient to effect a weight loss of at least about 50% but not more than 90%, said time being not more than about 10 minutes, maintaining the material in a non-oxidizing gas during the heat treatment, and then processing the thermally reacted product to a form desired for the smoking material.
Claim 2
Dependent Claim
96 words
In the method of producing a smokable material, the steps of exposing a carbohydrate material selected from the group consisting of cellulose, cellulosic derivatives, starch, pectin, polyvinyl alcohol, gum and aliginates to a temperature of from about 350° to about 750° C for a time sufficient to effect a weight loss of at least about 50% but not more than 90%, said time being not more than about 10 minutes, maintaining the material in a non-oxidizing gas during the heat treatment, and then processing the thermally reacted product to a form desired for the smoking material.
Claim 3
Dependent Claim
30 words
The method as claimed in claim 1 which includes the step of adding an ashing ingredient to the thermally reacted carbohydrate material in an amount up to 30% by weight.
Claim 4
Dependent Claim
27 words
The method as claimed in claim 1 wherein the said processing includes adding to the thermally reacted carbohydrate material natural tobacco, tobacco extract, or reconstituted tobacco materials.
Claim 5
Dependent Claim
25 words
The method as claimed in claim 1 which includes the step of adding to the thermal reaction product a coloring agent or a flavoring agent.
Claim 6
Dependent Claim
40 words
The method as claimed in claim 1 which includes the step of adding to the thermally reacted carbohydrate material an ammonium salt, organic amine, or urea in an amount to adjust the pH within the range of 7 to 8.5.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |