US3285255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin filter
Assignee: Eastman Kodak Co
•
Filing: 1965-06-07
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Granted: 1966-11-15
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Expires: 1985-06-07
Abstract
No abstract record available.
Inventors
- 👤 Touey George Patrick
- 👤 Ii Robert Chester Mumpower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:29
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A TOBACCO SMOKE FILTER CONSISTING OF A ROD-SHAPED BUNDLE OF CRIMPED CONTINUOUS POLYOLEFIN FILAMENTS HAVING DEPOSITED ON AND BETWEEN THE SUFACES OF SAID FILAMENTS IN SUBSTANTIALLY PERMANENT FORM A SUBSTANTIALLY NONPENETRATING SURFACE LAYER CAPABLE OF DISSOLVING PHENOL VAPORS AND AT LEAST MONOMOLECULAR IN THICKNESS OF 4 PERCENT TO 10 PERCENT BY WEIGHT OF SAID FILTER OF A WATERINSOLUBLE ACYLATE ESTER OF 2 TO 12 CARBON ATOMS HAVING A PHENOL REMOVAL CAPABILITY WHICH LASTS FOR AT LEAST ABOUT EIGHT WEEKS, SAID ACYLATE ESTER BEING EASILY SPRAYABLE AT 25-100*C. AND HAVING A BOILING POINT ABOVE ABOUT 200*C.
Claim 2
Dependent Claim
95 words
A TOBACCO SMOKE FILTER CONSISTING OF A ROD-SHAPED BUNDLE OF CRIMPED CONTINUOUS POLYOLEFIN FILAMENTS HAVING DEPOSITED ON AND BETWEEN THE SUFACES OF SAID FILAMENTS IN SUBSTANTIALLY PERMANENT FORM A SUBSTANTIALLY NONPENETRATING SURFACE LAYER CAPABLE OF DISSOLVING PHENOL VAPORS AND AT LEAST MONOMOLECULAR IN THICKNESS OF 4 PERCENT TO 10 PERCENT BY WEIGHT OF SAID FILTER OF A WATERINSOLUBLE ACYLATE ESTER OF 2 TO 12 CARBON ATOMS HAVING A PHENOL REMOVAL CAPABILITY WHICH LASTS FOR AT LEAST ABOUT EIGHT WEEKS, SAID ACYLATE ESTER BEING EASILY SPRAYABLE AT 25-100*C. AND HAVING A BOILING POINT ABOVE ABOUT 200*C.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |