US3144024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated filter means for tobacco articles
Assignee: Darby Food Corp
•
Filing: 1960-04-11
•
Granted: 1964-08-11
•
Expires: 1980-04-11
Abstract
No abstract record available.
Inventors
- 👤 Eichwald Eric
- 👤 John P Coan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:24
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A CYLINDRICAL TOBACCO SMOKE FILTER ESSENTIALLY CONSISTING OF AN INTEGRAL HOMOGENEOUS MASS OF CELLULOSE ESTER FILTER MATERIAL, A FLAVORING SUBSTANCE AND A SOLVENT SELECTED FROM THE GROUP CONSISTING OF TRIACETIN AND GLYCEROL TRIACETATE, SAID FILTER BEING MADE BY FIRST COMPLETELY DISSOLVING THE FLAVORING SUBSTANCE IN SAID SOLVENT SELECTED FROM THE GROUP CONSISTING OF TRIACETIN AND GLYEROL TRIACETATE AND THEN UTILIZING THE SOLUTION THUS OBTAINED TO IMPREGNATE SAID FILTER MATERIAL CONSISTING OF SAID CELLULOSE ESTER,
Claim 2
Dependent Claim
74 words
A CYLINDRICAL TOBACCO SMOKE FILTER ESSENTIALLY CONSISTING OF AN INTEGRAL HOMOGENEOUS MASS OF CELLULOSE ESTER FILTER MATERIAL, A FLAVORING SUBSTANCE AND A SOLVENT SELECTED FROM THE GROUP CONSISTING OF TRIACETIN AND GLYCEROL TRIACETATE, SAID FILTER BEING MADE BY FIRST COMPLETELY DISSOLVING THE FLAVORING SUBSTANCE IN SAID SOLVENT SELECTED FROM THE GROUP CONSISTING OF TRIACETIN AND GLYEROL TRIACETATE AND THEN UTILIZING THE SOLUTION THUS OBTAINED TO IMPREGNATE SAID FILTER MATERIAL CONSISTING OF SAID CELLULOSE ESTER,
References Cited (Backward Citations)
US2001709A
Cited
US2507299A
Cited
AT173262B
Cited
US2815761A
Cited
FR1166366A
Cited
US3017309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |