Patent US3361137A successfully refreshed from Google Patents.
US3361137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paperless cigarette filter
Assignee: Celanese Corp
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Filing: 1965-09-27
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Granted: 1968-01-02
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Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 George A Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:52
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0229; A24D3/0233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A SHAPE-RETAINING LPAPERLESS CIGARETTE FILTER PLUG COMPRISING A BUNDLE OF CRIMPED THERMOPLASTIC FILAMENTS OF TOTAL DENIER RANGING FROM ABOUT 30,000 TO 120,000 AND OF INDIVIDUAL DENIER RANGING FROM ABOUT 1.5 TO 25, ALL OF SAID FILAMENTS BECAUSE OF THEIR CRIMP JCONTACTING OTHER FILAMENTS AT A PLURALITY OF SPACED LOCATIONS, SAID BUNDLE OF FILAMENTS BEING SHEATHED IN A COHERENT SOLID COATING COMPOSED OF A MAJOR PROPORTION OF PETROLEUM WAX AND A MINOR PROPORTION OF A RESINOUS COPOLYMER CONSISTING ESSENTIALLY OF FROM ABOUT 5 TO 50% COMBINED VINYL ACETATE AND CORRESPONDINGLY FROM ABOUT 95 TO 50% COMBINED
Claim 2
Dependent Claim
95 words
A SHAPE-RETAINING LPAPERLESS CIGARETTE FILTER PLUG COMPRISING A BUNDLE OF CRIMPED THERMOPLASTIC FILAMENTS OF TOTAL DENIER RANGING FROM ABOUT 30,000 TO 120,000 AND OF INDIVIDUAL DENIER RANGING FROM ABOUT 1.5 TO 25, ALL OF SAID FILAMENTS BECAUSE OF THEIR CRIMP JCONTACTING OTHER FILAMENTS AT A PLURALITY OF SPACED LOCATIONS, SAID BUNDLE OF FILAMENTS BEING SHEATHED IN A COHERENT SOLID COATING COMPOSED OF A MAJOR PROPORTION OF PETROLEUM WAX AND A MINOR PROPORTION OF A RESINOUS COPOLYMER CONSISTING ESSENTIALLY OF FROM ABOUT 5 TO 50% COMBINED VINYL ACETATE AND CORRESPONDINGLY FROM ABOUT 95 TO 50% COMBINED
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |