US3093142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cigarette filter
Assignee: Celanese Corp
•
Filing: 1959-08-12
•
Granted: 1963-06-11
•
Expires: 1979-08-12
Abstract
No abstract record available.
Inventors
- 👤 Swerdloff Jack
- 👤 Ezra B Larsen
- 👤 Adriaan J Troeleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:03
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253; A; A24; A24D; A24D3/00; A24D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A FILTER COMPRISING A PLURALITY OF LONGITUDINALLY EXTENDING FILAMENTS HAVING A MULTIPLICITY OF SETS OF CRIMPS IMPARTED BY MECHANICAL CRIMPING, EACH OF SAID SETS OF CRIMPS COMPRISING INDIVIDUAL CRIMPS WHICH ARE ANGULARLY OFFSET WITH RESPECT TO THE GENERAL PLANE OF OTHER SETS OF CRIMPS, WHEREIN AT LEAST SOME OF SAID FILAMENTS ARE OF NONCIRCULAR SHAPE IN CROSS SECTION.
Claim 2
Dependent Claim
58 words
A FILTER COMPRISING A PLURALITY OF LONGITUDINALLY EXTENDING FILAMENTS HAVING A MULTIPLICITY OF SETS OF CRIMPS IMPARTED BY MECHANICAL CRIMPING, EACH OF SAID SETS OF CRIMPS COMPRISING INDIVIDUAL CRIMPS WHICH ARE ANGULARLY OFFSET WITH RESPECT TO THE GENERAL PLANE OF OTHER SETS OF CRIMPS, WHEREIN AT LEAST SOME OF SAID FILAMENTS ARE OF NONCIRCULAR SHAPE IN CROSS SECTION.
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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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |