US3101723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous cigarette filter
Assignee: Philip Morris USA Inc
•
Filing: 1960-11-15
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Granted: 1963-08-27
•
Expires: 1980-11-15
Abstract
No abstract record available.
Inventors
- 👤 Robert B Seligman
- 👤 Toepffer Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:00
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/16; A24D3/163
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A FILTER ADAPTED TO BE USED IN CONJUNCTION WITH A SMOKING ARTICLE WHICH COMPRISES A FIBROUS FILTERING MEDIUM, FROM ABOUT 15 TO ABOUT 50% BY WEIGHT OF SAID FILTERING MEDIUM OF ACTIVATED CARBON SUPERFICIALLY DISPERSED IN SAID FILTERING MEDIUM AND A MIXTURE CAUSING ADHERENCE BETWEEN SAID ACTIVATED CARBON AND SAID FILTERING MEDIUM, SAID MIXTURE COMPRISING FROM ABOUT 5% TO ABOUT 20% BY WEIGHT OF SAID FILER AND CONSISTING OF POLYVINYL PYRROLIDONE HAVING A DEGREE OF POLYMERIZATION NETWEEN ABOUT K15 AND K90 AND A POLYHYDRIC ALCOHOL, THE RATIO BETWEEN SAID POLYVINYL PYRROLIDONE AND SAID POLYHYDRIC ALCOHOL IN SAID MIXTURE BEING BETWEEN ABOUT 1:1 AND ABOUT 4:1.
Claim 2
Dependent Claim
105 words
A FILTER ADAPTED TO BE USED IN CONJUNCTION WITH A SMOKING ARTICLE WHICH COMPRISES A FIBROUS FILTERING MEDIUM, FROM ABOUT 15 TO ABOUT 50% BY WEIGHT OF SAID FILTERING MEDIUM OF ACTIVATED CARBON SUPERFICIALLY DISPERSED IN SAID FILTERING MEDIUM AND A MIXTURE CAUSING ADHERENCE BETWEEN SAID ACTIVATED CARBON AND SAID FILTERING MEDIUM, SAID MIXTURE COMPRISING FROM ABOUT 5% TO ABOUT 20% BY WEIGHT OF SAID FILER AND CONSISTING OF POLYVINYL PYRROLIDONE HAVING A DEGREE OF POLYMERIZATION NETWEEN ABOUT K15 AND K90 AND A POLYHYDRIC ALCOHOL, THE RATIO BETWEEN SAID POLYVINYL PYRROLIDONE AND SAID POLYHYDRIC ALCOHOL IN SAID MIXTURE BEING BETWEEN ABOUT 1:1 AND ABOUT 4:1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |