Patent US2795227A successfully refreshed from Google Patents.
US2795227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco smoke filter
Assignee: Individual
•
Filing: 1955-02-15
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Granted: 1957-06-11
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Expires: 1975-02-15
Abstract
No abstract record available.
Inventors
- 👤 Seldeen Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:17
CPC Classifications
A; A24; A24F; A24F13/00; A24F13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A TOBACCO SMOKING DEVICE HAVING A SMOKE FILTERING ELEMEMT, INCLUDING A SUBSTANCE COMPRISING A SUBSTANTIAL QUANTITY OF ZIRCONIUM MOUNTED IN POSTION THEREIN EXPOSED TO THE SMOKE.
Claim 2
Dependent Claim
26 words
A TOBACCO SMOKING DEVICE HAVING A SMOKE FILTERING ELEMEMT, INCLUDING A SUBSTANCE COMPRISING A SUBSTANTIAL QUANTITY OF ZIRCONIUM MOUNTED IN POSTION THEREIN EXPOSED TO THE SMOKE.
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) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |