US3080611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of cigarette filters
Assignee: Eastman Kodak Co
•
Filing: 1960-11-08
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Granted: 1963-03-12
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Expires: 1980-11-08
Abstract
No abstract record available.
Inventors
- 👤 Charles A Jarrett
- 👤 Witt I Langstaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:03
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0229; A24D3/0237; D; D01; D01D; D01D5/00; D01D5/04; D01D5/22; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A METHOD FOR THE PRODUCTION OF CIGARETTE FILTERS WHICH COMPRISES EXTRUDING A SOLUTION OF CELLULOSE ACETATE IN ACETONE WITH A SOLIDS CONTENT OF FROM ABOUT 15% TO ABOUT 30% AT A DRAFT RATIO OF LESS THAN ABOUT 0.15 UNDER A PRESSURE OF FROM ABOUT 200 P.S.I.G. TO ABOUT 2,000 P.S.I.G., AT A TEMPERATURE OF BETWEEN ABOUT 70*C. AND ABOUT 150* C., AT AN EXTRUSION VELOCITY OF FROM ABOUT 500 M./M. TO ABOUT 2000 M./M., AND THROUGH ORIFICES HAVING DIAMETERS OF FROM ABOUT 0.02 MM. TO ABOUT 0.06 MM. INTO AN ATMOSPHERE OF WARM AIR, SAID WARM AIR BEING INTRODUCED IN SUBSTANTIALLY EQUAL AMOUNTS FROM ABOVE AND BELOW THE POINT OF EXTRUSION, THEREBY CRIMPING THE FILIAMENTS FORMED BY THE EXTRUSION OF SAID SOLUTION OF CELLULOSE ACETATE IN ACETONE AND FASHIONING THEM INTO HIGHLY-CRINKLED AND ROUGHENED SURFACE FORM WHILE FLOATING THEM DOWNWARDLY, AND CONVERTING SAID FILAMENTS SUBSTANTIALLY DIRECTLY INTO CIGARETTE FILTERS HAVING A TARS REMOVAL OF GREATER THAN ABOUT 15%, A PRESSURE DROP OF LESS THAN ABOUT 5 MM. AND AN EFFICIENCY OF AT LEAST ABOUT 10%.
Claim 2
Independent Claim
175 words
A METHOD FOR THE PRODUCTION OF CIGARETTE FILTERS WHICH COMPRISES EXTRUDING A SOLUTION OF CELLULOSE ACETATE IN ACETONE WITH A SOLIDS CONTENT OF FROM ABOUT 15% TO ABOUT 30% AT A DRAFT RATIO OF LESS THAN ABOUT 0.15 UNDER A PRESSURE OF FROM ABOUT 200 P.S.I.G. TO ABOUT 2,000 P.S.I.G., AT A TEMPERATURE OF BETWEEN ABOUT 70*C. AND ABOUT 150* C., AT AN EXTRUSION VELOCITY OF FROM ABOUT 500 M./M. TO ABOUT 2000 M./M., AND THROUGH ORIFICES HAVING DIAMETERS OF FROM ABOUT 0.02 MM. TO ABOUT 0.06 MM. INTO AN ATMOSPHERE OF WARM AIR, SAID WARM AIR BEING INTRODUCED IN SUBSTANTIALLY EQUAL AMOUNTS FROM ABOVE AND BELOW THE POINT OF EXTRUSION, THEREBY CRIMPING THE FILIAMENTS FORMED BY THE EXTRUSION OF SAID SOLUTION OF CELLULOSE ACETATE IN ACETONE AND FASHIONING THEM INTO HIGHLY-CRINKLED AND ROUGHENED SURFACE FORM WHILE FLOATING THEM DOWNWARDLY, AND CONVERTING SAID FILAMENTS SUBSTANTIALLY DIRECTLY INTO CIGARETTE FILTERS HAVING A TARS REMOVAL OF GREATER THAN ABOUT 15%, A PRESSURE DROP OF LESS THAN ABOUT 5 MM. AND AN EFFICIENCY OF AT LEAST ABOUT 10%.
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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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |