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US3220904A
Expired / Lapsed
US
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Method of making a rigid filter for cigarettes
Assignee: Eastman Kodak Co
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Filing: 1962-01-18
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Granted: 1965-11-30
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Expires: 1982-01-18
Abstract
No abstract record available.
Inventors
- 👤 George P Touey
- 👤 Ii Robert C Mumpower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:33
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF MANUFACTURING TOBACCO SMOKE FILTERS FROM POLY-A-OLEFIN COMPOSITIONS WHICH COMPRISES MIXING A PLASTICIZER-SOLUBLE POLYMER INTO THE POLY-A-OLEFIN, SPINNING THE MIXTURE INTO FILAMENTS, FORMING A TOW FROM A MULTIPLICITY OF SAID FILAMENTS, AND CARRYING THE TOW WITH AN ORGANIC PLASTICIZER, FORMING THE TOW INTO A FILTER ROD, AND RIGIDIFYING THE FILTER ROD AT ROOM TEMPERATURE FOR A PERIOD OF 4 TO 24 HOURS TO PROMOTE PLASTICIZING OF THE PLASTICIZER-SOLUBLE POLYMER WHEREBY THE FILTER ROD BECOMES RIGID.
Claim 2
Independent Claim
77 words
A METHOD OF MANUFACTURING TOBACCO SMOKE FILTERS FROM POLY-A-OLEFIN COMPOSITIONS WHICH COMPRISES MIXING A PLASTICIZER-SOLUBLE POLYMER INTO THE POLY-A-OLEFIN, SPINNING THE MIXTURE INTO FILAMENTS, FORMING A TOW FROM A MULTIPLICITY OF SAID FILAMENTS, AND CARRYING THE TOW WITH AN ORGANIC PLASTICIZER, FORMING THE TOW INTO A FILTER ROD, AND RIGIDIFYING THE FILTER ROD AT ROOM TEMPERATURE FOR A PERIOD OF 4 TO 24 HOURS TO PROMOTE PLASTICIZING OF THE PLASTICIZER-SOLUBLE POLYMER WHEREBY THE FILTER ROD BECOMES RIGID.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |