Patent US3196037A successfully refreshed from Google Patents.
US3196037A
Expired / Lapsed
US
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Preparation of cigarette filter tips
Assignee: YARSLEY RES LAB Ltd
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Filing: 1961-06-01
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Granted: 1965-07-20
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Expires: 1981-06-01
Abstract
No abstract record available.
Inventors
- 👤 Yarsley Victor Emmanuel
- 👤 Titow Witold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:46
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; A24D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD FOR THE MANUFACTURE OF CIGARETTE FILTERS FROM CELLULOSE ACETATE WHICH HAS A PITTED "ACTIVE" SURFACE COMPRISING THE STEPS OF IMPREGNATING A FIBROUS SHEET CARRIER WITH A SOLUTION OF CELLULOSE ACETATE WHICH HAS ADDED THERETO A PRECIPITANT LIQUID IN AN AMOUNT ADJUSTED TO APPROACH THE PRECIPITATION POINT, TREATING THE SO IMPREGNATED CARRIER WITH THE PRECIPITANT TO OCCASION "IN SITU" FORMATION OF THE "ACTIVE" CELLULOSE ACETATE ON THE CARRIER THE SAID IMPREGNATED CARRIER BEING ADAPTED TO BE FORMED INTO A FILTER TIP FOR ASSOCIATION WITH A CIGARETTE.
Claim 2
Independent Claim
87 words
A METHOD FOR THE MANUFACTURE OF CIGARETTE FILTERS FROM CELLULOSE ACETATE WHICH HAS A PITTED "ACTIVE" SURFACE COMPRISING THE STEPS OF IMPREGNATING A FIBROUS SHEET CARRIER WITH A SOLUTION OF CELLULOSE ACETATE WHICH HAS ADDED THERETO A PRECIPITANT LIQUID IN AN AMOUNT ADJUSTED TO APPROACH THE PRECIPITATION POINT, TREATING THE SO IMPREGNATED CARRIER WITH THE PRECIPITANT TO OCCASION "IN SITU" FORMATION OF THE "ACTIVE" CELLULOSE ACETATE ON THE CARRIER THE SAID IMPREGNATED CARRIER BEING ADAPTED TO BE FORMED INTO A FILTER TIP FOR ASSOCIATION WITH A CIGARETTE.
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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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |