US2904050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco smoke filtering elements
Assignee: Eastman Kodak Co
•
Filing: 1955-01-05
•
Granted: 1959-09-15
•
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 01:49
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.
References Cited (Backward Citations)
US556218A
Cited
US413036A
Cited
US712818A
Cited
GB292479A
Cited
US1919959A
Cited
US2113122A
Cited
US2171770A
Cited
US2207156A
Cited
US2558855A
Cited
GB623964A
Cited
US2707308A
Cited
US2789563A
Cited
US2721820A
Cited
US2688380A
Cited
US2751320A
Cited
US2774680A
Cited
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 |