US3434479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanganate tobacco smoke filter
Assignee: Liggett Group LLC
•
Filing: 1966-09-15
•
Granted: 1969-03-25
•
Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 Derek Elliott Till
- 👤 Philip Leo Levins
- 👤 David Hamilton Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:15
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190228470A
Cited
US2815760A
Cited
US2795227A
Cited
US3057915A
Cited
US3049399A
Cited
US3251365A
Cited
US3354886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |