Patent US2904050A successfully refreshed from Google Patents.
US2904050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco smoke filtering elements
Assignee: Eastman Kodak Co
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Filing: 1955-01-05
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Granted: 1959-09-15
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Expires: 1975-01-05
Abstract
No abstract record available.
Inventors
- 👤 John E Kiefer
- 👤 George P Touey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:50
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/14; A24D3/08; A24D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A TOBACCO SMOKE FILTERING ELEMENT COMPRISED OF A UNITARY ROD-LIKE BUNDLE OF AT LEAST 10,000 CONTINUOUS CELLULOSE ACETATE FILAMENTS, THE BUNDLE BEING APPROXIMATELY 8.1 MM. IN DIAMETER, THE FILAMENTS OF THE BUNDLE BEING LONGITUDINALLY ALIGNED AND COEXTENSIVE WITH THE LENGTH OF THE FILTER ELEMENT, AND THE FILAMENTS HAVING NONORIENTED SHORT PORTIONS THEREOF CRIMPED INTO DIVERGING AND CONVERGING RELATIONSHIP TO THE MAIN FILAMENT ALIGNMENT, THE SPACING OF THE ADJACENT ALIGNED CONTINUOUS FILAMENTS PROVIDING LONGITUDINAL PASSAGES FOR SMOKE THROUGH THE BUNDLE, THE FILTER ELEMENT BEING FURTHER CHARACTERIZED IN THAT THE AFORESAID FILAMENTS CARRY AND HAVE RELATIVELY UNIFORMLY DISTRIBUTED ON THE SURFACES OF THE FILAMENT 1-30% BY WEIGHT OF A WAX.
Claim 2
Dependent Claim
108 words
A TOBACCO SMOKE FILTERING ELEMENT COMPRISED OF A UNITARY ROD-LIKE BUNDLE OF AT LEAST 10,000 CONTINUOUS CELLULOSE ACETATE FILAMENTS, THE BUNDLE BEING APPROXIMATELY 8.1 MM. IN DIAMETER, THE FILAMENTS OF THE BUNDLE BEING LONGITUDINALLY ALIGNED AND COEXTENSIVE WITH THE LENGTH OF THE FILTER ELEMENT, AND THE FILAMENTS HAVING NONORIENTED SHORT PORTIONS THEREOF CRIMPED INTO DIVERGING AND CONVERGING RELATIONSHIP TO THE MAIN FILAMENT ALIGNMENT, THE SPACING OF THE ADJACENT ALIGNED CONTINUOUS FILAMENTS PROVIDING LONGITUDINAL PASSAGES FOR SMOKE THROUGH THE BUNDLE, THE FILTER ELEMENT BEING FURTHER CHARACTERIZED IN THAT THE AFORESAID FILAMENTS CARRY AND HAVE RELATIVELY UNIFORMLY DISTRIBUTED ON THE SURFACES OF THE FILAMENT 1-30% BY WEIGHT OF A WAX.
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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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |