US3039908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a tobacco smoke filter
Assignee: Hollingsworth and Vose Co
•
Filing: 1953-07-13
•
Granted: 1962-06-19
•
Expires: 1973-07-13
Abstract
No abstract record available.
Inventors
- 👤 Harris B Parmele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:18
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0229; A24D3/0233; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF MAKING CYLINDRICAL TOBACCO SMOKE FILTER UNITS, WHICH COMPRISES MIXING FIBERS OF RANDOM LENGTHS BETWEEN ABOUT .03 AND ABOUT 2.0 INCHES TO FORM A HETEROGENEOUS MASS, GATHERING SAID MASS INTO AN ELONGATED ROVING HAVING A DIAMETER IN EXCESS OF THE DIAMETER OF THE FINISHED FILLTER UNIT AND HAVING MACRO-VOIDS BETWEEN THE FIBRES, RADIALLY COMPRESSING THE ROVING INTO A ROPE HAVING APPROXIMATELY THE DIAMETER OF THE FINISHED FILTER UNIT TO REDUCED THE MACRO-VOIDS TO MICRO-VOIDS, WRAPPING THE ROPE WITH SHEET MATERIAL, AND SEVERING THE ROPE INTO FILTER UNITS.
Claim 2
Independent Claim
89 words
A METHOD OF MAKING CYLINDRICAL TOBACCO SMOKE FILTER UNITS, WHICH COMPRISES MIXING FIBERS OF RANDOM LENGTHS BETWEEN ABOUT .03 AND ABOUT 2.0 INCHES TO FORM A HETEROGENEOUS MASS, GATHERING SAID MASS INTO AN ELONGATED ROVING HAVING A DIAMETER IN EXCESS OF THE DIAMETER OF THE FINISHED FILLTER UNIT AND HAVING MACRO-VOIDS BETWEEN THE FIBRES, RADIALLY COMPRESSING THE ROVING INTO A ROPE HAVING APPROXIMATELY THE DIAMETER OF THE FINISHED FILTER UNIT TO REDUCED THE MACRO-VOIDS TO MICRO-VOIDS, WRAPPING THE ROPE WITH SHEET MATERIAL, AND SEVERING THE ROPE INTO FILTER UNITS.
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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) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |