US3190294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cigarette filters
Assignee: Celanese Corp
•
Filing: 1958-09-30
•
Granted: 1965-06-22
•
Expires: 1978-09-30
Abstract
No abstract record available.
Inventors
- 👤 Donald T Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0229; A24D3/0233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A SHAPE-RETAINING CIGARETTE FILTER PLUG COMPRISING A PLURALITY OF CRIMPED THERMOPLASTIC FILAMENTS OF TOTAL DENIER RANGING FROM ABOUT 60,000 TO 120,000 AND OF INDIVIDUAL DENIER RANGING FROM ABOUT 3 TO 16, ALL OF SAID FILAMENTS BECAUSE OF THEIR CRIMP CONTACTING OTHER FILAMENTS AT A PLURALITY OF SPACED LOCATIONS, THE OUTERMOST FILAMENTS BEING PLASTICIZED AND COHERED INTO A SHAPERETAINING SURFACE WITHOUT LOSS OF THEIR FILAMENTARY CHARACTER, SAID PLUG HAVING A SMOOTH SURFACE.
Claim 2
Dependent Claim
71 words
A SHAPE-RETAINING CIGARETTE FILTER PLUG COMPRISING A PLURALITY OF CRIMPED THERMOPLASTIC FILAMENTS OF TOTAL DENIER RANGING FROM ABOUT 60,000 TO 120,000 AND OF INDIVIDUAL DENIER RANGING FROM ABOUT 3 TO 16, ALL OF SAID FILAMENTS BECAUSE OF THEIR CRIMP CONTACTING OTHER FILAMENTS AT A PLURALITY OF SPACED LOCATIONS, THE OUTERMOST FILAMENTS BEING PLASTICIZED AND COHERED INTO A SHAPERETAINING SURFACE WITHOUT LOSS OF THEIR FILAMENTARY CHARACTER, SAID PLUG HAVING A SMOOTH SURFACE.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |