US3359148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tobacco smoke filters and method of making the same
Assignee: Kurashiki Rayon Co Ltd
•
Filing: 1963-08-30
•
Granted: 1967-12-19
•
Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
- 👤 Fukui Shojiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:45
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204; A24D3/0212; A24D3/0225; A24D3/06; A24D3/08; A24D3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD FOR THE MANUFACTURE OF TOBACCO SMOKE FILTERS WHICH COMPRISES IN SEQUENCE THE STEPS, (1) PROVIDING A TOW OF PARALLEL CRIMPED RAYON FIBERS, SAID FIBERS HAVING A MONOFILAMENT DENIER OF 0.3 TO 4.0 AND 15 TO 40 CRIMPS PER INCH, THE TOTAL DENIER OF SAID TOW BEING 40,000 TO 70,000, (2) OPENING SAID TOW, (3) APPLYING AN ADHESIVE IN POWDER FORM TO THE FIBERS IN SAID OPENED TOW, (4) REFORMING THE THUS-TREATED TOW, (5) THEREAFTER APPLYING TO THE TOW A SOLVENT FOR THE SAID ADHESIVE, AND (6) EVAPORATING SAID SOLVENT FROM THE TOW WHEREBY CRIMPED FIBERS ADHERE WITHIN SAID TOW.
Claim 2
Independent Claim
101 words
A METHOD FOR THE MANUFACTURE OF TOBACCO SMOKE FILTERS WHICH COMPRISES IN SEQUENCE THE STEPS, (1) PROVIDING A TOW OF PARALLEL CRIMPED RAYON FIBERS, SAID FIBERS HAVING A MONOFILAMENT DENIER OF 0.3 TO 4.0 AND 15 TO 40 CRIMPS PER INCH, THE TOTAL DENIER OF SAID TOW BEING 40,000 TO 70,000, (2) OPENING SAID TOW, (3) APPLYING AN ADHESIVE IN POWDER FORM TO THE FIBERS IN SAID OPENED TOW, (4) REFORMING THE THUS-TREATED TOW, (5) THEREAFTER APPLYING TO THE TOW A SOLVENT FOR THE SAID ADHESIVE, AND (6) EVAPORATING SAID SOLVENT FROM THE TOW WHEREBY CRIMPED FIBERS ADHERE WITHIN SAID TOW.
References Cited (Backward Citations)
US2483406A
Cited
US3039908A
Cited
US2805671A
Cited
US2794759A
Cited
US2979433A
Cited
US3017309A
Cited
US3026226A
Cited
US3079929A
Cited
US3079978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |