US3224453A
Expired / Lapsed
US
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Assignee: Celanese Corp
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Filing: 1963-04-08
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Granted: 1965-12-21
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 William R Mahoney
- 👤 Pierre Richard E St
- 👤 Donald T Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:20
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PLUG OF SUBSTANTIALLY UNIFORM CROSS-SECTIONAL DENSITY FOR CIGARETTE FILTERS COMPRISING A TOW OF ABOUT 3000 TO 120,000 CRIMPED CONTINUOUS FILAMENTS OF LESS THAN ABOUT 25 DENIER PER FILAMENT, THE CRIMPS OF SAID FILAMENTS GENERALLY BEING OUT OF REGISTRY WITH ONE ANOTHER, SAID CRIMPS HAVING BEEN DEREGISTERED BY A METHOD COMPRISING LONGITUDINALLY MOVING THE TOW HAVING FILAMENTS THE CRIMPS OF WHICH IS GENERALLY IN REGISTRY, WHILE CONTACTING THE TOW WITH AT LEAST ONE RIDGE, SAID RIDGE BEING INCLINED TO THE PATH OF MOVEMENT OF THE TWO, THEREBY TO DISPLACE SOME OF THE FILAMENTS OF THE TOW RELATIVE TO OTHER FILAMENTS OF THE TOW WHEREBY THE CRIMPS OF THE FILAMENTS ARE GENERALLY MOVED OUT OF THE REGISTRY, SAID PLUG HAVING A DENSITY LESS THAN ABOUT 0.23 GRAM PER CUBIC CENTIMETER AND A SMOKEREMOVAL EFFICIENCY OF AT LEAST ABOUT 15%.
Claim 2
Dependent Claim
138 words
A PLUG OF SUBSTANTIALLY UNIFORM CROSS-SECTIONAL DENSITY FOR CIGARETTE FILTERS COMPRISING A TOW OF ABOUT 3000 TO 120,000 CRIMPED CONTINUOUS FILAMENTS OF LESS THAN ABOUT 25 DENIER PER FILAMENT, THE CRIMPS OF SAID FILAMENTS GENERALLY BEING OUT OF REGISTRY WITH ONE ANOTHER, SAID CRIMPS HAVING BEEN DEREGISTERED BY A METHOD COMPRISING LONGITUDINALLY MOVING THE TOW HAVING FILAMENTS THE CRIMPS OF WHICH IS GENERALLY IN REGISTRY, WHILE CONTACTING THE TOW WITH AT LEAST ONE RIDGE, SAID RIDGE BEING INCLINED TO THE PATH OF MOVEMENT OF THE TWO, THEREBY TO DISPLACE SOME OF THE FILAMENTS OF THE TOW RELATIVE TO OTHER FILAMENTS OF THE TOW WHEREBY THE CRIMPS OF THE FILAMENTS ARE GENERALLY MOVED OUT OF THE REGISTRY, SAID PLUG HAVING A DENSITY LESS THAN ABOUT 0.23 GRAM PER CUBIC CENTIMETER AND A SMOKEREMOVAL EFFICIENCY OF AT LEAST ABOUT 15%.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |