US3669126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filters for tobacco smoke
Assignee: Lemo Ltd
•
Filing: 1971-02-24
•
Granted: 1972-06-13
•
Expires: 1991-02-24
Abstract
Abstract The specification discloses a filter for tobacco smoke which includes a basic substance, such as calcium hydroxide, which is capable of reacting with acid gases present in the tobacco smoke to remove certain of the undesirable impurities in the tobacco smoke, and to provide in the filter water through which the tobacco smoke is drawn to cool it and to remove particulate matters which otherwise would be carried by the tobacco smoke into the body of the smoker.
Inventors
- 👤 Elie Michel Soussa
- 👤 Jabbour Habayeb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:25
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A cigarette containing the filter of claim 1.
Claim 2
Dependent Claim
9 words
A cigarette holder containing the filter of claim 1.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |