Patent US3501418A successfully refreshed from Google Patents.
Patent US3285253A successfully refreshed from Google Patents.
US3285253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cigarette with paper wrapper treated for ember-charring action to prevent formation of high temperature smoke fractions in burning tobacco
Assignee: Individual
•
Filing: 1964-03-13
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Granted: 1966-11-15
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Expires: 1984-03-13
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Lebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:28
CPC Classifications
A; A24; A24D; A24D1/00; A24D1/02; A24D1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A CIGARETTE PAPER WRAPPER TREATED WITH AN OXIDIZING AGENT TO LOWER THE BURNING PINT OF THE PAPER, WHEREBY THE LATTER WILL CHAR FROM HEAT AND AN ADJACENT GLOWING EMBER, WITH THE CHARRED PORTION OF THE PAPER BEING IMPERVIOUS TO THE PASSAGE OF AIR THERETHROUGH, THE OXIDIZING AGENT CONSISTING OF A SOLUTION OF AT LEAST 10% STRENGTH AMMONIUM NITRATE THAT WILL DECOMPOSED INTO NITROGEN AND WATER VAPOR AT APPROXIMATELY 410* FAHRENHEIT, A POINT BELOW THE CHARRING TEMPERATURE OF THE PAPER.
Claim 2
Dependent Claim
79 words
A CIGARETTE PAPER WRAPPER TREATED WITH AN OXIDIZING AGENT TO LOWER THE BURNING PINT OF THE PAPER, WHEREBY THE LATTER WILL CHAR FROM HEAT AND AN ADJACENT GLOWING EMBER, WITH THE CHARRED PORTION OF THE PAPER BEING IMPERVIOUS TO THE PASSAGE OF AIR THERETHROUGH, THE OXIDIZING AGENT CONSISTING OF A SOLUTION OF AT LEAST 10% STRENGTH AMMONIUM NITRATE THAT WILL DECOMPOSED INTO NITROGEN AND WATER VAPOR AT APPROXIMATELY 410* FAHRENHEIT, A POINT BELOW THE CHARRING TEMPERATURE OF THE PAPER.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |