US2954772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of tar and other deleterious substances from tobacco smoke
Assignee: Mac Farland Aveyard & Co
•
Filing: 1957-05-28
•
Granted: 1960-10-04
•
Expires: 1977-05-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Lebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:45
CPC Classifications
A; A24; A24F; A24F13/00; A24F13/02; A24F13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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Cited
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US2705013A
Cited
US2785681A
Cited
US2764513A
Cited
GB760772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |