Patent US3364938A successfully refreshed from Google Patents.
US3364938A
Expired / Lapsed
US
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Tobacco smoke filter containing porous non-sifting polyolefin particles
Assignee: Eastman Kodak Co
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Filing: 1966-01-04
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Granted: 1968-01-23
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Expires: 1986-01-04
Abstract
No abstract record available.
Inventors
- 👤 Ii Robert C Mumpower
- 👤 George P Touey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:21
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/26; B01D3/28; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; B01D11/0434; B01D11/0484; B01D3/16; B01D3/18; B01D3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A TOBACCO SMOKE FILTER ADAPTED TO REMOVE TAR AND NICOTINE FROM TOBACCO SMOKE, SAID FILTER BEING COMPRISED OF A BUNDLE OF GENERALLY LONGITUDINALLY EXTENDING SYNTHETIC FILAMENTS, SAID FILAMENTS CARRYING ON THEIR SURFACE PARTICLES OF A POLYOLEFIN MATERIAL, SUBSTANTIALLY ALL OF SAID POLYOLEFIN PARTICLES INDIVIDUALLY HVING FROM 40 TO 90 PERCENT VOID SPACE THEREIN, WHEREIN THERE IS NO ADHESIVE BONDING BETWEEN THE PARTICLES AND THE FILAMENTS AND A WRAPPER ENCLOSING THE PERIPHERY OF SAID BUNDLE, THE FILTER BEING FURTHER CHARACTERIZED IN THAT (A) THE POROUS POLYOLEFIN MATERIAL IS IN THE FORM OF FLOCCULENT OR FIBROUS FORM AND (B) THE POROUS POLYOLEFIN MATERIAL DOES NOT SIFT OUT OF THE FILTER WHEN IT IS VIGOROUSLY TAPPED.
Claim 2
Dependent Claim
113 words
A TOBACCO SMOKE FILTER ADAPTED TO REMOVE TAR AND NICOTINE FROM TOBACCO SMOKE, SAID FILTER BEING COMPRISED OF A BUNDLE OF GENERALLY LONGITUDINALLY EXTENDING SYNTHETIC FILAMENTS, SAID FILAMENTS CARRYING ON THEIR SURFACE PARTICLES OF A POLYOLEFIN MATERIAL, SUBSTANTIALLY ALL OF SAID POLYOLEFIN PARTICLES INDIVIDUALLY HVING FROM 40 TO 90 PERCENT VOID SPACE THEREIN, WHEREIN THERE IS NO ADHESIVE BONDING BETWEEN THE PARTICLES AND THE FILAMENTS AND A WRAPPER ENCLOSING THE PERIPHERY OF SAID BUNDLE, THE FILTER BEING FURTHER CHARACTERIZED IN THAT (A) THE POROUS POLYOLEFIN MATERIAL IS IN THE FORM OF FLOCCULENT OR FIBROUS FORM AND (B) THE POROUS POLYOLEFIN MATERIAL DOES NOT SIFT OUT OF THE FILTER WHEN IT IS VIGOROUSLY TAPPED.
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) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |