US2881771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cigarette filters
Assignee: Eastman Kodak Co
•
Filing: 1954-12-20
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Granted: 1959-04-14
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Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 George P Touey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:36
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; A24D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A TOBACCO SMOKE FILTERING ELEMENT COMPRISING A STRUCTURALLY UNITARY ROD-LIKE MASS OF CELLULOSE ACETATE FIBERS AND A WRAPPER ENCIRCLING THE MASS, EACH FIBER OF THE MASS BEING SUBSTANTIALLY COEXTENSIVE THEREWITH, THE FIBERS AS A WHOLE BEING IN SUBSTANTIALLY PARALLELISM LONGITUDINALLY THE MASS BUT SUBSTANTIALLY EACH OF THE INDIVIDUAL FIBERS HAVING A PLURALITY OF SHORT PORTIONS THEREOF CRIMPED INTO DIVERGING AND CONVERGING RELATIONSHIP TO THE MAIN FIBER AXIS, A PLURALITY OF THE FIBERS HAVING SURFACES SOLVATION BONDS TO CONTIGUOUS FIBERS AT RANDOM POINTS OF CONTACT, THE MASS CARRYING SUBSTANTIALLY UNIFORMLY DISPERSED THEREIN A SOLID FINELY DIVIDED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF HYDROXYETHYL CELLULOSE, METHYL CELLULOSE, SODIUM CARBOXYMETHYL CELLULOSE, AND CARBOXYMETHYL CELLULOSE IN THE AMOUNT OF 1-60% BY WEIGHT OF THE MASS.
Claim 2
Dependent Claim
122 words
A TOBACCO SMOKE FILTERING ELEMENT COMPRISING A STRUCTURALLY UNITARY ROD-LIKE MASS OF CELLULOSE ACETATE FIBERS AND A WRAPPER ENCIRCLING THE MASS, EACH FIBER OF THE MASS BEING SUBSTANTIALLY COEXTENSIVE THEREWITH, THE FIBERS AS A WHOLE BEING IN SUBSTANTIALLY PARALLELISM LONGITUDINALLY THE MASS BUT SUBSTANTIALLY EACH OF THE INDIVIDUAL FIBERS HAVING A PLURALITY OF SHORT PORTIONS THEREOF CRIMPED INTO DIVERGING AND CONVERGING RELATIONSHIP TO THE MAIN FIBER AXIS, A PLURALITY OF THE FIBERS HAVING SURFACES SOLVATION BONDS TO CONTIGUOUS FIBERS AT RANDOM POINTS OF CONTACT, THE MASS CARRYING SUBSTANTIALLY UNIFORMLY DISPERSED THEREIN A SOLID FINELY DIVIDED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF HYDROXYETHYL CELLULOSE, METHYL CELLULOSE, SODIUM CARBOXYMETHYL CELLULOSE, AND CARBOXYMETHYL CELLULOSE IN THE AMOUNT OF 1-60% BY WEIGHT OF THE MASS.
References Cited (Backward Citations)
GB435168A
Cited
FR813324A
Cited
US2228383A
Cited
US2325386A
Cited
GB665278A
Cited
US2707308A
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US2789563A
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FR1081215A
Cited
US2739913A
Cited
US2774680A
Cited
US2780228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |