US2881772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco smoke filters
Assignee: Eastman Kodak Co
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Filing: 1956-02-29
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Granted: 1959-04-14
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Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 George P Touey
- 👤 John E Kiefer
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:41
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A TOBACCO SMOKE FILTER COMPRISED ESSENTIALLY OF SEVERAL THOUSAND CONTINUOUS LONGITUDINALLY ORIENTED FIBERS, SAID FIBERS CARRYING ON THEIR SURFACE PARTICLES OF A SALT DERIVED FROM THE REACTION OF A FREE ACID RADICAL-CONTAINING COMPOUND FROM THE GROUP CONSISTING OF ALGINIC ACID, CARBOXY METHYL CELLULOSE, POLYACRYLIC ACID, MALEIC ANHYDRIDEVUNYL ACETATE, ITACONIC ASCID, CITRACONIC ACID, CELLULOSE ACID CITRATE AND CELLULOSE ACID PHTHALTE WITH A POLAMINE FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE, DIETHYLENERIAMINE, TRIETHYLENETETRAMINE, TETRAETHYLENETAMINE, 1,2-PROPYLENE DIAMINE, 1,3-PROPYLENE DIAMINE, 1,4-BUTANEDIAMINE, AND 1,6-HEXANE DIAMINE.
Claim 2
Dependent Claim
80 words
A TOBACCO SMOKE FILTER COMPRISED ESSENTIALLY OF SEVERAL THOUSAND CONTINUOUS LONGITUDINALLY ORIENTED FIBERS, SAID FIBERS CARRYING ON THEIR SURFACE PARTICLES OF A SALT DERIVED FROM THE REACTION OF A FREE ACID RADICAL-CONTAINING COMPOUND FROM THE GROUP CONSISTING OF ALGINIC ACID, CARBOXY METHYL CELLULOSE, POLYACRYLIC ACID, MALEIC ANHYDRIDEVUNYL ACETATE, ITACONIC ASCID, CITRACONIC ACID, CELLULOSE ACID CITRATE AND CELLULOSE ACID PHTHALTE WITH A POLAMINE FROM THE GROUP CONSISTING OF ETHYLENE DIAMINE, DIETHYLENERIAMINE, TRIETHYLENETETRAMINE, TETRAETHYLENETAMINE, 1,2-PROPYLENE DIAMINE, 1,3-PROPYLENE DIAMINE, 1,4-BUTANEDIAMINE, AND 1,6-HEXANE DIAMINE.
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) | 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 |