Patent US2938818A successfully refreshed from Google Patents.
US2938818A
Expired / Lapsed
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Tobacco composition and smoking unit containing material for eliminating deleterious matter
Assignee: Minerals & Chemicals Corp Of A
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Filing: 1957-11-19
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Granted: 1960-05-31
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Expires: 1977-11-19
Abstract
No abstract record available.
Inventors
- 👤 Charles A Specht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:28
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/18; A24B15/28; A24B15/287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A SMOKING MIXTURE COMPRISING TOBACCO HAVING COMMINGLED THEREWITH A SMALL AMOUNT OF A MIXTURE OF HYDRATED LINE AND AN ACID-ACTIVATED CLAY SELECTED FROM THE GROUP CONSISTING OF KAOLIN CLAY, HALLOYSITE CLAY AND MONTMORILLONITE CLAY.
Claim 2
Dependent Claim
34 words
A SMOKING MIXTURE COMPRISING TOBACCO HAVING COMMINGLED THEREWITH A SMALL AMOUNT OF A MIXTURE OF HYDRATED LINE AND AN ACID-ACTIVATED CLAY SELECTED FROM THE GROUP CONSISTING OF KAOLIN CLAY, HALLOYSITE CLAY AND MONTMORILLONITE CLAY.
References Cited (Backward Citations)
US604338A
Cited
US2007407A
Cited
US2108860A
Cited
US2282922A
Cited
GB666308A
Cited
GB685822A
Cited
US2797689A
Cited
US2839065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |